answer: #Person2# chooses to have beer before the meal and wants more after #Person1# tells #Person2# it's free.
documents: #Person1#: Excuse me. Would you like a drink before your meal?
  #Person2#: Pardon me?
  #Person1#: Would you like a drink?
  #Person2#: Oh, I see. I'll have beer, please.
  #Person1#: OK. Here you are.
  #Person2#: Thank you. How much is it?
  #Person1#: Well, all the drinks including beer are free of charge.
  #Person2#: Are you sure? Then, I will have more beer, please.
  #Person1#: Don't worry. We will come back again a little later.