fix prompt parsing

app.py

@@ -217,11 +217,11 @@ def reasoner(query: str, documents: list[str], llm_client: Any):
 # Accept user input
 if prompt := st.chat_input("Type here"):
     # Add user message to chat history
-    prompt = prompt + "  \n"+ "  \n"+ f"Retriever: {selected_retriever}, Reasoner: {selected_reasoner}"
-    st.session_state.messages.append({"role": "user", "content": prompt})
+    display_message = prompt + "  \n"+ "  \n"+ f"Retriever: {selected_retriever}, Reasoner: {selected_reasoner}"
+    st.session_state.messages.append({"role": "user", "content": display_message})
     # Display user message in chat message container
     with st.chat_message("user"):
-        st.markdown(prompt)
+        st.markdown(display_message)
 
     options = {}
     options["max_tokens"] = 500