didn't initialise total_text

app.py

@@ -127,7 +127,7 @@ def chatbot(message, history):
     response, sources = handle_query(message, faiss_index, all_texts, embedding_model)
     print("Query:", message)
     print("Response:", response)
-    
+    total_text = response
     
     if sources:
         print("Sources:", sources)