Update app.py

app.py

@@ -228,7 +228,7 @@ def message_and_history(message, history):
 
     # Combine the most recent conversation turns, excluding the assistant's prefix.
     conversation_context = "\n".join(
-        [f"{msg['role']}: {msg['content'].replace('<b>LA2050 Navigator:</b><br>', '')}" for msg in history[0:]]
+        [f"{msg['role']}: {msg['content'].replace('<b>LA2050 Navigator:</b><br>', '')}" for msg in history[-1:]]
     )
     retrieved_docs = retriever.invoke(conversation_context)