Update app.py

app.py

@@ -68,7 +68,7 @@ if persist_directory :
         st.session_state['history'] = []
 
     if 'ai_history' not in st.session_state:
-        st.session_state['ai_history'] = ["Hi!"]
+        st.session_state['ai_history'] = ["Sure, I am here to help!"]
 
     if 'user_history' not in st.session_state:
         st.session_state['user_history'] = ["Hi, I would like to know more about the courses in KaggleX!"]