Update app.py

app.py

@@ -90,5 +90,5 @@ with gr.Blocks(theme=gr.themes.Monochrome(),css="footer{display:none !important}
     
     txt.submit(fn = return_sent, inputs = None, outputs = txt)
     txt.submit(fn = predict_prompt, inputs = [txt, user_id], outputs = Chatbot, show_progress = 'hidden') # Adding the messages into the row with gradio.
-        
+    Chatbot.change(placeholder = initial_message)
 chatblock.launch() # launch!