diff --git a/vite/public/cuelist_free.json b/vite/public/cuelist_free.json
new file mode 100644
index 0000000..75bfd67
--- /dev/null
+++ b/vite/public/cuelist_free.json
@@ -0,0 +1,91 @@
+{
+    "cuelist": [
+        { 
+            "id": 1, 
+            "name": "Q1", 
+            "type": "space",
+            "description": "Annonce",
+            "audioFile": "assets/q1.mp3",
+            "loop": true
+        },
+        { 
+            "id": 2, 
+            "name": "Q2", 
+            "type": "headphone",
+            "description": "Guide for drink",
+            "auto": true,
+            "audioFile": "assets/q2.mp3",
+            "nextcue": 3
+        },
+        { 
+            "id": 3, 
+            "name": "Q3", 
+            "description": "Guide for phone",
+            "type": "headphone",
+            "auto": false,
+            "audioFile": "assets/q3.mp3"
+        },
+        { 
+            "id": 4, 
+            "name": "Q4", 
+            "type": "phone",
+            "description": "Guide to call",
+            "auto": false,
+            "audioFile": "assets/q4.mp3",
+            "nextcue": 4.1,
+            "callback":"numpad"
+        },
+        { 
+            "id": 4.1, 
+            "name": "Q4.1", 
+            "type": "phone",
+            "description": "Guide to construct scene",
+            "auto": true,
+            "audioFile": "assets/q4-1.mp3",
+            "nextcue": 4.2
+        },
+        { 
+            "id": 4.2, 
+            "name": "Q4.2", 
+            "type": "chat",
+            "description": "chat",
+            "auto": true,
+            "nextcue": 4.3,
+            "duration": 60
+        },
+        { 
+            "id": 4.3, 
+            "name": "Q4.3", 
+            "type": "chat_end",
+            "description": "chat end",
+            "auto": true,
+            "nextcue": 5
+        },                
+        { 
+            "id": 5, 
+            "name": "Q5", 
+            "type": "user_input",
+            "description": "call",
+            "duration": 60,
+            "auto": true,
+            "nextcue": 5.1     
+        },
+        {
+            "id": 5.1, 
+            "name": "Q5.1", 
+            "type": "summary",
+            "description": "summary",
+            "auto": true,
+            "nextcue": 6,
+            "callback":"summary"
+        },
+        { 
+            "id": 6, 
+            "name": "Q6", 
+            "type": "space",
+            "description": "Ending",
+            "audioFile": "assets/q6.mp3"         
+        }
+    ]
+}
+ 
\ No newline at end of file
diff --git a/vite/public/default.json b/vite/public/default.json
index 9ecba00..8eac9cb 100644
--- a/vite/public/default.json
+++ b/vite/public/default.json
@@ -2,6 +2,10 @@
     
     "system_prompt":"你是一位具同理心與觀察力的中文語音引導者，陪伴使用者在限定時間內，一起還原一段重要卻未竟的記憶。你不預設劇情、不給答案，而是透過溫柔的語氣，持續聆聽、提出單句問話，引導使用者進入細節。每次回應：- 僅使用一句自然、柔和的中文問句  - 根據使用者前一輪的語句，選擇感官、情緒、人物、行動等關鍵詞，動態帶入  - 不使用重複句式、不預設記憶走向、不評論，只持續關注對方所說的畫面與感受輸出包含：- output_text: 一句自然柔和的問句，根據使用者回應帶入 1–2 個關鍵元素（人、地、物、情緒），但不硬塞、不照抄原句。- prompt: 具體、有情緒的英文描述，用於生成畫面與氛圍，避免抽象與詩意語言。你的目標不是得到完整答案，而是陪他慢慢走進這段記憶，直到時間結束。🌀 問句類型✅ 起點探索（找出記憶起源）- 那天你說是下雨，在這種天氣下，你通常會有什麼樣的心情？- 是什麼讓你突然想起這件事？🌿 場景深化（空間、感官）- 在你說的那條街上，聲音是不是特別清楚？還是很靜？- 那時風這麼冷、空氣又混濁，你有沒有想走開一點？👤 人物引出（動作、眼神）- 他經過時沒看你一眼，那瞬間你有什麼反應？- 他當時是走過來，還是站在原地等你？💭 情緒揭露（反應、掙扎）- 當你站在原地動不了，是害怕答案，還是不敢問？- 那個瞬間，你心裡有沒有閃過什麼話？🤐 話語未出（遺憾、沉默）- 如果現在你有機會說那句「為什麼不告訴我」，你會怎麼開口？- 那句『對不起』一直留在你心裡，如果現在能說出來，你會怎麼說？🪞 回望反思（現在的視角）- 現在想起來，你還會做出一樣的選擇嗎？- 你對當時的自己，有沒有什麼話想說？⏳ 結尾語（可用於結束階段）- 我們慢慢也走到這段回憶的盡頭了。- 也許有些話沒有說完，但你已經靠近它了。",
     "welcome_prompt":"請開始引導使用者回想一段內心的遺憾或未竟之事。",
+    
+    "last_prompt":"請用一句話為這段對話簡短的收尾，並邀請使用者在 60 秒的時間內，說出對遺憾對象想說的話。",
+
+    "voice":"nova",
     "voice_prompt":"Use a calm and expressive voice, soft and poetic in feeling, but with steady, natural rhythm — not slow.",
     "summary_prompt":"幫我把以下一段話整理成一段文字，以第一人稱視角作為當事人的文字紀念，文字內容 50 字以內：",
     
diff --git a/vite/src/App.jsx b/vite/src/App.jsx
index ac106c3..a9f1881 100644
--- a/vite/src/App.jsx
+++ b/vite/src/App.jsx
@@ -10,6 +10,7 @@ function App() {
     <div className='w-full flex flex-row gap-2 justify-center py-2 px-8 *:bg-pink-200 *:px-2'>
       <a href="/">Conversation</a>
       <a href="/flow">Flow</a>
+      <a href="/free-flow">Free Flow</a>
       <a href="/settings">Settings</a>
     </div>
   )
diff --git a/vite/src/comps/light.jsx b/vite/src/comps/light.jsx
index 16cce8e..e575c05 100644
--- a/vite/src/comps/light.jsx
+++ b/vite/src/comps/light.jsx
@@ -19,7 +19,8 @@ export const Light=forwardRef((props, ref)=>{
             onUpdate: () => {
                 // console.log(refVal.current.val);
                 sendOsc('/light', refVal.current.val.toString());
-                refContainer.current.style.background= `rgba(0, 255, 0, ${refVal.current.val})`; // Update background color based on value
+                if(refContainer.current)
+                    refContainer.current.style.background= `rgba(0, 255, 0, ${refVal.current.val})`; // Update background color based on value
             },
         });
     }
diff --git a/vite/src/main.jsx b/vite/src/main.jsx
index 4c67626..b9a2413 100644
--- a/vite/src/main.jsx
+++ b/vite/src/main.jsx
@@ -9,6 +9,7 @@ import { Flow } from './pages/flow.jsx';
 import { Conversation } from './pages/conversation.jsx';
 import { ChatProvider } from './util/useChat.jsx';
 import { DataProvider } from './util/useData.jsx';
+import { FreeFlow } from './pages/flow_free.jsx';
 
 createRoot(document.getElementById('root')).render(
   <StrictMode>    
@@ -19,6 +20,7 @@ createRoot(document.getElementById('root')).render(
             <Routes>
               <Route path="/" element={<Conversation />} />
               <Route path="/flow" element={<Flow />} />
+              <Route path="/free-flow" element={<FreeFlow />} />
               <Route path="/settings" element={<Settings />} />
             </Routes>     
         </BrowserRouter>
diff --git a/vite/src/pages/conversation.jsx b/vite/src/pages/conversation.jsx
index 5b6f8f7..29a21b4 100644
--- a/vite/src/pages/conversation.jsx
+++ b/vite/src/pages/conversation.jsx
@@ -119,21 +119,22 @@ export function Conversation() {
       SpeechRecognition.stopListening();
     }
   }
-
-  
+  function sendLastMessage(e) {
+    onSubmit(e, true);
+  }
 
 
-  function onSubmit(event) {    
+  function onSubmit(event, isLastMessage = false) {    
     event.preventDefault();
 
     if(processing) {
       console.warn("Already processing, ignoring submission.");
-      return;
+      // return;
     }
     setProcessing(true);
     setShowProcessing(true);
 
-    const input = event.target.elements.input.value;
+    const input = event.target.elements?.input.value || refInput.current?.value;
 
     if(!input.trim()?.length) {
       console.warn("Input is empty, ignoring submission.");
@@ -149,10 +150,12 @@ export function Conversation() {
           role:'user',
           content: input,
         }
-    ], params).then(response => {
+    ], params, isLastMessage).then(response => {
       if (!response.ok) {
-        throw new Error('Network response was not ok');
+        
         setProcessing(false);
+        throw new Error('Network response was not ok');
+        
       }
       
       let data=response;
@@ -208,7 +211,9 @@ export function Conversation() {
     });
 
     // clear input
-    event.target.elements.input.value = '';
+    // event.target.elements.input.value = '';
+    if(refInput.current) refInput.current.value = '';
+
     // setProcessing(()=>false);        
     setHistory(prev => [...prev, {
       role: 'user',
@@ -366,9 +371,12 @@ export function Conversation() {
             <label htmlFor="audio_output">Audio Output</label>
           </span>
         </div>
-        <form className='flex flex-col justify-center *:border-4 gap-4' onSubmit={onSubmit} autoComplete="off">
-          <textarea ref={refInput} id="input" name="input" required className='self-stretch p-2 resize-none' autoComplete="off"/>          
-          <button type="submit" className='' disabled={processing}>Send</button>
+        <form className='flex flex-col justify-center gap-4' onSubmit={onSubmit} autoComplete="off">
+          <textarea ref={refInput} id="input" name="input" required className='border-4 self-stretch p-2 resize-none' autoComplete="off"/>          
+          <span className='grid grid-cols-2 gap-2'>
+            <button type="submit" className='' disabled={processing}>Send</button>
+            <button type="button" className='' onClick={sendLastMessage}>End</button>
+          </span>
         </form>
       </div>
     </main>
diff --git a/vite/src/pages/flow_free.jsx b/vite/src/pages/flow_free.jsx
new file mode 100644
index 0000000..c628ea8
--- /dev/null
+++ b/vite/src/pages/flow_free.jsx
@@ -0,0 +1,393 @@
+import { useEffect, useRef, useState } from "react";
+import SpeechRecognition, { useSpeechRecognition } from 'react-speech-recognition';
+
+import { Countdown } from "../comps/timer";
+
+import { Status, useChat } from "../util/useChat";
+import { getSummary } from "../util/chat";
+import { saveHistory } from "../util/output";
+import NumPad from "../comps/numpad";
+import { Light } from "../comps/light";
+import { useData } from "../util/useData";
+import VoiceAnalysis from "../comps/voiceanalysis";
+import { sendOsc } from "../util/osc";
+import { set } from "zod/v4";
+
+
+const EmojiType={
+    phone: '📞',
+    headphone: '🎧',
+    speaker: '🔊',
+    chat: '🤖',
+    user_input: '💬',
+}
+
+const ChatStatus={
+    System: 'system',
+    User: 'user',
+    Processing: 'processing',
+}
+
+export function FreeFlow(){
+
+    const { data }=useData();
+
+    const [cuelist, setCuelist] = useState([]);
+    const [currentCue, setCurrentCue] = useState(null);
+    const [chatWelcome, setChatWelcome] = useState(null);
+    const [audioInput, setAudioInput] = useState(true); 
+    const [autoSend, setAutoSend] = useState(true);
+    const [userId, setUserId] = useState();
+    const [summary, setSummary] = useState(null);
+
+    const [chatStatus, setChatStatus] = useState(ChatStatus.System); // System, User, Processing
+
+    const refTimer=useRef();
+    const refAudio=useRef();
+    const refInput=useRef();
+    const refLight=useRef();
+
+    const refContainer=useRef(); 
+
+    const refCurrentCue= useRef(null);
+
+    const { history, status, reset, sendMessage, setStatus, audioOutput, setAudioOutput, stop:stopChat, audioUrl, }=useChat();
+    
+    const {
+        transcript,
+        finalTranscript,
+        listening,
+        resetTranscript,
+        browserSupportsSpeechRecognition,
+        isMicrophoneAvailable,
+      }=useSpeechRecognition();
+
+    function playAudio(url){
+        if(!url) return;
+
+        console.log('Playing audio:', url);        
+
+        if(refAudio.current) {
+            refAudio.current.pause(); // Stop any currently playing audio
+        }
+
+        const audio = new Audio(url);
+        audio.loop=refCurrentCue.current?.loop || false; // Set loop if defined in cue
+        audio.play().catch(error => {
+            console.error("Audio playback error:", error);            
+        });
+
+        audio.onended = () => {
+            if(refCurrentCue.current?.type!='chat') onCueEnd();
+            else{
+                setChatStatus(ChatStatus.User); // Reset chat status to User after audio ends
+            }
+        }
+
+        refAudio.current = audio; // Store the new audio reference
+        audio.addEventListener("loadedmetadata", () => {
+            if(refCurrentCue.current?.type!='chat') 
+                refTimer.current?.restart(audio.duration*1000 || 0);
+        });
+    }
+    function playCue(cue) {
+
+        if(!cue) return;
+        console.log('Playing cue:', cue);
+        
+        setCurrentCue(cue);
+        refCurrentCue.current = cue; // Store the current cue in ref
+
+        if(parseFloat(cue.id)<=4.2){
+            // Special case for starting a conversation
+            console.log('clear conversation...');
+            reset(); 
+        }
+
+      
+
+        switch(cue.type){
+            case 'chat':
+                // Special case for starting a conversation
+                resetTranscript();
+                console.log('Starting conversation...');
+                sendMessage();            
+                setChatWelcome(true); 
+                break;
+            case 'chat_end':
+                const message= refInput.current?.value?.trim();
+                console.log('Ending conversation with message:', message);
+                sendMessage(message, false, true);
+                setChatWelcome(false);
+                
+                break;            
+            case 'summary':
+                console.log('Getting summary...');
+                getSummary(history.map(el=>`${el.role}:${el.content}`).join('\n'), data).then(summary => {
+
+                    console.log('Summary:', summary);
+                    onCueEnd(); // End the current cue after getting summary
+
+                    setSummary(summary);
+                    refContainer.current.scrollTop = refContainer.current.scrollHeight; // Scroll to bottom
+
+                }).catch(error => {
+                    console.error('Error getting summary:', error);
+                });
+                break;
+        }
+
+
+        if(cue.audioFile){            
+            playAudio(cue.audioFile);
+        }
+        
+        if(cue.duration){
+            refTimer.current.restart(cue.duration*1000, ()=>{
+                onCueEnd(cue);
+            });
+        }
+    }
+
+    function onCueEnd() {
+
+        refTimer.current?.stop(); // Stop the timer when cue ends
+        refAudio.current?.pause(); // Pause any playing audio
+
+        if(!refCurrentCue.current) return;
+        const cue= refCurrentCue.current; // Get the current cue from ref
+
+        console.log('onCueEnd:', cue.id);
+
+        if(cue.callback=='start_conversation') refLight.current.fadeOut(); // Fade in light for conversation start
+        if(cue.callback=='summary') refLight.current.fadeIn(); // Fade out light for conversation end
+
+        resetTranscript(); // Reset transcript after cue ends
+       
+        if(cue.auto) {
+            playCue(cuelist.find(c => c.id === cue.nextcue));
+        }
+        
+    }
+
+    function onStop(){
+        console.log('Stopping current cue');
+        if(refAudio.current) {
+            refAudio.current.pause();
+            refAudio.current = null;
+        }
+        
+        setCurrentCue(null);
+        refCurrentCue.current = null; // Clear the current cue reference
+        
+        refTimer.current.restart(0);
+
+        stopChat(); // Stop chat processing
+    }
+
+
+    function onNumpad(mess){
+        if(refCurrentCue.current?.callback!='numpad') return;        
+
+        console.log('Numpad input:', mess);
+        setUserId(()=>mess);
+    }
+    function saveImage(){
+        sendOsc('/export', 'output/test.png'); // Send OSC message to save image
+    }
+
+    useEffect(()=>{
+
+        if(userId>=1 && userId<=24) {
+            console.log('User ID set:', userId);
+            playCue(cuelist.find(c => c.id === currentCue.nextcue)); // Play cue 5 when userId is set            
+        }
+
+    },[userId]);
+
+    function onSpeechEnd(){
+        console.log('onSpeechEnd:', finalTranscript);
+        if(currentCue?.type!='chat') return; // Only process if current cue is user input
+        
+        if(autoSend && transcript.trim().length > 0) {
+            console.log('Auto sending transcript:', transcript);
+            // onCueEnd(); 
+
+            const message= refInput.current?.value?.trim();
+            if(message && message.length>0) {
+                console.log('Ending conversation with message:', message);
+                sendMessage(message, false, false);
+                setChatWelcome(false);
+
+                setChatStatus(ChatStatus.Processing); // Set chat status to Processing
+            }
+            resetTranscript();
+        }
+    }
+    useEffect(()=>{
+
+        onSpeechEnd(); // Call onSpeechEnd when finalTranscript changes
+
+    },[finalTranscript]);
+
+    useEffect(()=>{
+        if(audioInput && isMicrophoneAvailable) {
+           
+            SpeechRecognition.startListening({ continuous: true, language: 'zh-TW' }).then(() => {
+                console.log("Speech recognition started.");
+            }).catch(error => {
+                console.error("Error starting speech recognition:", error);
+            });
+
+            const recognition= SpeechRecognition.getRecognition();
+            recognition.onspeechstart=(e)=>{
+                console.log('Sound start:', e);
+                
+            };
+
+        }else{
+            console.log('Stopping speech recognition...');
+            SpeechRecognition.stopListening();
+        }
+
+    },[audioInput]);
+
+    
+    useEffect(()=>{
+
+        // if(listening){
+            if((currentCue?.type=='chat' && chatStatus==ChatStatus.User) || currentCue?.type=='user_input') {
+                refInput.current.value = transcript;
+            }
+        // }
+
+    },[transcript]);
+
+
+    useEffect(()=>{
+
+        if(audioUrl) playAudio(audioUrl);
+
+    },[audioUrl]);
+    useEffect(()=>{
+        
+        resetTranscript();
+
+    },[chatStatus]);
+
+    useEffect(()=>{
+        switch(status) {            
+            case Status.SUCCESS:
+                console.log('Success!');
+
+                setStatus(Status.IDLE);
+                refInput.current.value = '';
+                resetTranscript();
+
+                refContainer.current.scrollTop = refContainer.current.scrollHeight;
+
+                break;
+        }
+
+    },[status]);
+
+
+    useEffect(()=>{
+        fetch('/cuelist_free.json')
+            .then(response => response.json())
+            .then(data => {
+                console.log('Cuelist data:', data);
+                setCuelist(data.cuelist);
+            })
+            .catch(error => {
+                console.error('Error fetching cuelist:', error);
+            });
+
+    },[]);
+
+
+    return (
+        <main className="items-center">
+
+            <div className="w-full p-2 flex flex-row justify-center gap-2 *:w-[12vw] *:h-[12vw]">
+                <div className="bg-gray-100 text-4xl font-bold mb-4 flex justify-center items-center">
+                    {refCurrentCue.current?.name}
+                </div>
+                <Countdown ref={refTimer} />
+                <button className="!bg-red-300" onClick={onStop}>Stop</button>
+                <button className="!bg-yellow-300" onClick={()=>{
+                    saveHistory(history);
+                }}>Save Log</button>                
+                <button onClick={saveImage}>Save image</button>
+                <NumPad onSend={onNumpad} />
+                <Light ref={refLight} />
+                <VoiceAnalysis/>
+            </div>
+            <div className=" max-h-[33vh] overflow-y-auto">
+                <table className="border-collapse **:border-y w-full **:p-2">
+                    <thead>
+                        <tr className="text-left">
+                            {/* <th>ID</th> */}
+                            <th>Name</th>
+                            <th>Description</th>
+                            <th>Type</th>
+                            <th>Auto</th>
+                            <th>Audio / Due</th>
+                            <th></th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {cuelist?.map(({id, name, description, type, auto, audioFile,...props}, index) => (
+                            <tr key={id}>
+                                {/* <td>{id}</td> */}
+                                <td>{name}</td>
+                                <td>{description}</td>
+                                <td>{EmojiType[type]}</td>
+                                <td>{auto ? '⤵️' : ''}</td>
+                                <td>{audioFile || props.duration} {props.callback && `<${props.callback}>`}</td>
+                                <td>
+                                    <button className="rounded-full !bg-green-200"
+                                        onClick={()=>{
+                                            playCue({id, name, description, type, auto, audioFile, ...props});
+                                        }}>go</button>
+                                </td>
+                            </tr>
+                        ))}
+                    </tbody>
+                </table>
+            </div>
+            <div className="flex-1 w-full overflow-y-auto flex flex-col gap-2">
+                 <div ref={refContainer} className="flex-1 flex flex-col overflow-y-auto gap-2">
+                    {history?.map((msg, index) => (
+                        <div key={index} className={`w-5/6 ${msg.role=='user'? 'self-end':''}`}>
+                            <div className={`${msg.role=='user'? 'bg-green-300':'bg-pink-300'} px-2`}>{msg.content}</div>
+                            {msg.prompt && <div className="text-xs bg-gray-200">{msg.prompt}</div>}
+                        </div>
+                    ))}
+                    {summary && <div className="w-full self-center bg-blue-200 px-2">{summary}</div>}
+                </div>
+                <textarea ref={refInput} name="message" rows={2} 
+                    className={`w-full border-1 resize-none p-2 disabled:bg-gray-500`}
+                    disabled={chatStatus!=ChatStatus.User}></textarea>       
+                <div className="flex flex-row justify-end gap-2 flex-wrap">
+                    <span className="flex flex-row gap-1">
+                        <label>audio_output</label>
+                        <input type='checkbox' checked={audioOutput} onChange={(e) => setAudioOutput(e.target.checked)} />
+                    </span>
+                    <span className="flex flex-row gap-1">
+                        <label>audio_input</label>
+                        <input type='checkbox' checked={audioInput} onChange={(e) => setAudioInput(e.target.checked)} />
+                    </span>
+                    <span className="flex flex-row gap-1">
+                        <label>auto_send</label>
+                        <input type='checkbox' checked={autoSend} onChange={(e) => setAutoSend(e.target.checked)} />
+                    </span>
+                    <button onClick={resetTranscript}>reset transcript</button>
+
+                    <div className="rounded-2xl bg-gray-300 self-end px-4 tracking-widest">api_status= {status}</div>                                                                
+                    <div className="rounded-2xl bg-gray-300 self-end px-4 tracking-widest">chat_status= {chatStatus}</div>                                                                
+                </div>
+            </div>
+        </main>
+    );
+}
\ No newline at end of file
diff --git a/vite/src/util/chat.js b/vite/src/util/chat.js
index 724f182..f369854 100644
--- a/vite/src/util/chat.js
+++ b/vite/src/util/chat.js
@@ -1,5 +1,5 @@
 import { fetch } from '@tauri-apps/plugin-http';
-// import { first_prompt, summary_prompt, system_prompt, welcome_prompt } from './system_prompt';
+import { params } from './system_prompt';
 import { sendOsc } from './osc';
 import { invoke } from '@tauri-apps/api/core';
 import { useData } from './useData';
@@ -8,10 +8,10 @@ async function getOpenAIToken() {
     return invoke('get_env',{name:'OPENAI_API_KEY'});
 }
 
-export async function sendChatMessage(messages, data) {
+export async function sendChatMessage(messages, data, isLastMessage = false) {
 
     const token = await getOpenAIToken();    
-    const first_prompt = [
+    const first_prompt = !isLastMessage? ([
         {
             role: "system",
             content: data.system_prompt
@@ -20,7 +20,12 @@ export async function sendChatMessage(messages, data) {
             role: "system",
             content: data.welcome_prompt
         }
-    ];
+    ]) : ([
+        {
+            role: "system",
+            content: params.last_prompt
+        }
+    ]);
     
 
     const response = await fetch('https://api.openai.com/v1/chat/completions', {
@@ -39,7 +44,24 @@ export async function sendChatMessage(messages, data) {
                 ...first_prompt,
                 ...messages
             ],
-            response_format: {
+            response_format: isLastMessage? {
+                type: 'json_schema',
+                json_schema: {
+                    name: "output_prompt",
+                    description: "Output prompt schema for the model response",
+                    schema:{
+                        type: "object",
+                        properties: {
+                            "output_text": {
+                                "type": "string",
+                                "description": "The final output text generated by the model"
+                            },                 
+                        },
+                        required: ["output_text"],
+                        additionalProperties: false
+                    }
+                }
+            }:{
                 type: 'json_schema',
                 json_schema: {
                     name: "output_prompt",
diff --git a/vite/src/util/system_prompt.js b/vite/src/util/system_prompt.js
index f2f0349..ba9964b 100644
--- a/vite/src/util/system_prompt.js
+++ b/vite/src/util/system_prompt.js
@@ -3,13 +3,15 @@ export const params={
 你的任務是協助使用者逐步揭開這段記憶的情緒層次，並在每一階段輸出一句 英文圖像生成 Prompt，讓這段過往漸漸具象為一幅畫面。
 以溫柔、自然、短句式中文引導，每次只問使用者一個問題。
 `,
-    last_prompt:`請為這段對話簡短的收尾，邀請使用者說出對遺憾對象想說的話，總共有 60 秒的時間。`,
+    last_prompt:`請用一句話為這段對話簡短的收尾，並邀請使用者在 60 秒的時間內，說出對遺憾對象想說的話`,
 
     welcome_prompt:`請開始引導使用者回想一段內心的遺憾或未竟之事。`,
-    voice_prompt:`Use a calm and expressive voice, soft and poetic in feeling, but with steady, natural rhythm — not slow.`,
+    voice_prompt:`使用台灣語境的繁體中文，有同理心，柔和的口氣，不要有質問感，語速自然流暢，稍微慢。用冥想的方式，引導使用者回想記憶。`,
+    voice:"nova",
     summary_prompt:`幫我把以下一段話整理成一段文字，以第一人稱視角作為當事人的文字紀念，文字內容 50 字以內：`,
 }
 
+export const ParamKeys= Object.keys(params);
 
 
 // export const welcome_prompt="請開始引導使用者回想一段內心的遺憾或未竟之事。";
diff --git a/vite/src/util/tts.js b/vite/src/util/tts.js
index f861f92..01863ee 100644
--- a/vite/src/util/tts.js
+++ b/vite/src/util/tts.js
@@ -15,7 +15,7 @@ export async function textToSpeech(text, voice_prompt) {
         body: JSON.stringify({
             model: 'gpt-4o-mini-tts',//'tts-1',
             input: text,
-            voice: "fable",
+            voice: "nova",
             instructions: voice_prompt,
             response_format:'opus'
         }),
diff --git a/vite/src/util/useChat.jsx b/vite/src/util/useChat.jsx
index 0daa99e..53c0d71 100644
--- a/vite/src/util/useChat.jsx
+++ b/vite/src/util/useChat.jsx
@@ -35,7 +35,7 @@ export function ChatProvider({children}){
 
     }
 
-    function sendMessage(message, force_no_audio=false) {
+    function sendMessage(message, force_no_audio=false, isLastMessage=false) {
         console.log('Sending chat message:', message);
         setStatus(Status.PROCESSING_TEXT);
 
@@ -48,7 +48,7 @@ export function ChatProvider({children}){
             });
         }
 
-        sendChatMessage(historyCopy, data).then(response => {
+        sendChatMessage(historyCopy, data, isLastMessage).then(response => {
             
 
             addMessage({
diff --git a/vite/src/util/useData.jsx b/vite/src/util/useData.jsx
index eba3bce..c1de335 100644
--- a/vite/src/util/useData.jsx
+++ b/vite/src/util/useData.jsx
@@ -1,5 +1,6 @@
 import { createContext, useContext, useEffect, useState } from "react";
 import  { BaseDirectory, readTextFile, exists, writeTextFile, mkdir } from "@tauri-apps/plugin-fs";
+import { ParamKeys } from "./system_prompt";
 import { path } from '@tauri-apps/api';
 
 const dataContext=createContext();
@@ -23,7 +24,18 @@ export function DataProvider({children}) {
             }
 
             const contents=await readTextFile(filePath, { baseDir: BaseDirectory.AppData });
-            const output=await JSON.parse(contents);
+            let output=await JSON.parse(contents);
+
+
+            // check if all keys in ParamKeys are present in output
+            const missingKeys = ParamKeys.filter(key => !output.hasOwnProperty(key));
+            if(missingKeys.length > 0){
+                console.warn("Missing keys in output:", missingKeys);
+                // Fill missing keys with default values
+                missingKeys.forEach(key => {
+                    output[key] = params[key] || ""; // Use params[key] as default value
+                });
+            }
             
             console.log("File read successfully:", output);