Update src/llamaindex_backend.py

src/llamaindex_backend.py

@@ -17,7 +17,7 @@ Reply as faifhfully as possible and in no more than 5 complete sentences unless
 
 <chat history>
 {context_history}
-<chat history>
+</chat history>
 
 <context>
 {context_from_index}
@@ -63,7 +63,7 @@ class GLlamaIndex():
             result = await self.index.retrieve_context(query)
             return result["result"]
             
-        extended_query = f"[History]\n{history[-1]}\n[New Query]\n{query}"
+        extended_query = f"<chat history>]\n{history[:-1]}\n</chat history><new query>\n{query}\n</new query>"
         results = await self.index.aretrieve_context_multi(
             [query, extended_query]
         )