update start message

Gradio_UI.py

@@ -262,7 +262,8 @@ class GradioUI:
         import gradio as gr
 
         with gr.Blocks(fill_height=True) as demo:
-            stored_messages = gr.State([])
+            start_message = "Please provide a task for the agent to solve."
+            stored_messages = gr.State([gr.ChatMessage(role="assistant", content=start_message)])
             file_uploads_log = gr.State([])
             chatbot = gr.Chatbot(
                 label="Agent",