answer: #Person1# sends breakfast to #Person2# which is charged from #Person2#'s account.
documents: #Person1#: Room service. May I come in?
  #Person2#: Come in please.
  #Person1#: This is your breakfast. Can I put it here?
  #Person2#: Sure. How much is it?
  #Person1#: That's $ 10.
  #Person2#: Well, here is the money.
  #Person1#: Sir, you don't have to pay right now. Just sign here and we will charge it to your account.
  #Person2#: Fine.