answer: #Person2# treated #Person1# to pizza. #Person1# will treat #Person2# to some other flavors next time.
documents: #Person1#: Thanks for the pizza. It was delicious. 
  #Person2#: It's okay. 
  #Person1#: Next time, it's on me. 
  #Person2#: Don't be silly. 
  #Person1#: I'm serious. 
  #Person2#: Alright. Next time, we can try some other flavors. 
  #Person1#: Certainly. The vegetarian pizza looks pretty good. It must be very delicious. 
  #Person2#: Definitely. I really like Italian food.