Update app.py

app.py

@@ -137,8 +137,8 @@ for message in st.session_state.messages:
     with st.chat_message(name_to_role(message['name'])):
         st.markdown(message['content'])
 
-if prompt := st.chat_input("Start talking with your tutor!"):
-    st.session_state.messages.append({"role": "user", "content": prompt})
+if prompt := st.chat_input("Start talking with your student!"):
+    st.session_state.messages.append({"role": name_to_role(m["name"]), "content": prompt})
     with st.chat_message(name_to_role('tutor')):
         st.markdown(prompt)