answer: #Person2# orders a super size double cheeseburger meal with sprite and pays for it with #Person1#'s assistance.
documents: #Person1#: Can I help you?
  #Person2#: I'd like the double cheese burger meal, please.
  #Person1#: What kind of drink would you like with that?
  #Person2#: Just coke will be fine.
  #Person1#: Would you like a super size meal? Only 2 RMB more, you'll get large coke and fries instead of medium. And today we are offering free toys all the meal boxes.
  #Person2#: That sounds good, thanks, I'd like that. Actually I'd like sprite instead of coke, thanks.
  #Person1#: That's not a problem, Miss. Will that be it?
  #Person2#: Yes, that's all.
  #Person1#: That will be 25RMB, please
  #Person2#: You got it.