Add intro message

Gradio_UI.py

@@ -262,10 +262,13 @@ class GradioUI:
     def launch(self, **kwargs):
         import gradio as gr
 
+        history = [gr.ChatMessage(role="assistant", content="I am a professor assistant for the Data Science course! Please describe your current study needs and knowledge level and I will provide you with a custom code exercise.")]
+
         with gr.Blocks(fill_height=True) as demo:
             stored_messages = gr.State([])
             file_uploads_log = gr.State([])
             chatbot = gr.Chatbot(
+                history
                 label="Agent",
                 type="messages",
                 avatar_images=(