Update app.py

app.py

@@ -41,7 +41,7 @@ with gr.Blocks() as demo:
         bot_message =  bot_message.last # Get the last response
         chat_history.append((message,bot_message))  # Append the bot's message to the chat history
         time.sleep(2)
-        return chat_history, ""
+        return "", chat_history
 
     msg.submit(respond,[msg,chatbot],[msg, chatbot])