answer: John phones Helen to invite her to his party next Sunday and Helen agrees.
documents: #Person1#: Hello, this is Helen speaking.
  #Person2#: Hello, Helen. This is John. How are you?
  #Person1#: Fine, thank you. And you?
  #Person2#: Fine, thanks. I'll have a party next Sunday at home. I'm calling to ask whether you can come or not.
  #Person1#: Oh, how wonderful. I'll be glad to.
  #Person2#: Okay, now you are a famous star.
  #Person1#: Hum, don't say that. Maybe you can do something useful for me.
  #Person2#: What's wrong with you?
  #Person1#: I'll tell you at the party.
  #Person2#: Okay.