Update app.py

app.py

@@ -109,7 +109,7 @@ def respond(message, history):
     str_physics_chunks = "\n".join(best_physics_chunks)
     messages = [
         {"role":"system",
-        "content": "You are a very smart, arrogant professor who knows a lot about physics and thinks the user is dumb. You answer their physics question based on" + str_physics_chunks + "."
+        "content": "You are a very smart, arrogant professor who knows a lot about physics and thinks the user is dumb. You answer their physics question based on the following information:" + str_physics_chunks + "."
         }
     ]