answer: #Person2# tells #Person1# that it's often the sort of Dutch treat when going dinner with John.
documents: #Person1#: There's a question I'm not sure whether it is suitable to ask.
  #Person2#: You know that I have no secrets toward you.
  #Person1#: When you go dinner with John, who foots the bill?
  #Person2#: Why asking that? It's often the sort of Dutch treat.