Refactor respond function to set model parameters before processing dialog history

app.py

@@ -17,8 +17,12 @@ def respond(
     """
     Respond to user input using the model.
     """
-    history_langchain_format = []
+    # Set the model parameters
+    model.temperature = temperature
+    model.top_p = top_p
+    model.max_output_tokens = max_new_tokens
 
+    history_langchain_format = []
     # Add the dialog history to the history
     for msg in dialog_history:
         if msg['role'] == "user":