Fix problem with conversation not being initialized

app.py

@@ -29,6 +29,9 @@ st.title("Adrega AI Help")
 user_input = st.text_input('Ask me a question') 
 include_context = st.checkbox('Search in Help')
 
+if 'conversation' not in st.session_state: 
+    st.session_state.conversation = ""
+
 if st.button("Submit"): 
     if user_input: 
         if include_context: