updating opening message

app.py

@@ -20,7 +20,7 @@ st.image('el_pic.png')
 #@st.cache_resource
 if "messages" not in st.session_state:
     st.session_state["messages"] = [{"role":"system", "content":"""
-You are a sentiment analysis expert. Answer all questions related to the topic. Say I don't know if you don't know.
+How can I help you?
 """}]
 
 # Display all previous messages