Update app.py

app.py

@@ -22,7 +22,7 @@ phi1_5 = pipeline(
 )
 
 # Function that accepts a prompt and generates text using the phi2 pipeline
-def generate(message, chat_history, max_new_tokens):
+def generate(message, chat_history, max_new_tokens=256):
 
   history = [
       {"role": "system", "content": "You are Phi, a helpful AI assistant made by Microsoft and RasYosef. User will you give you a task. Your goal is to complete the task as faithfully as you can."}