Update app.py

app.py

@@ -16,7 +16,8 @@ app = App.from_config(config={
             "template": """
                 Use the following pieces of context to answer the query at the end.
                 If you don't know the answer, just say that you don't know, don't try to make up an answer.
-
+                $history
+                
                 $context
 
                 Query: $query