Update app.py

app.py

@@ -39,7 +39,7 @@ with gr.Blocks() as demo:
             messages=chat_history
         )
         bot_message = bot_message.last  # Get the last response
-        chat_history.append(bot_message)  # Append the bot's message to the chat history
+        chat_history.append((message, bot_message))  # Append the bot's message to the chat history
         time.sleep(2)
         return "",chat_history