answer: Allen invites Cathy to the concert and will pick Cathy at 6:30.
documents: #Person1#: Hello, is that Cathy speaking?
  #Person2#: Yes, is that you, Allen?
  #Person1#: Yes, how are you doing?
  #Person2#: Not bad.
  #Person1#: Say I've got two tickets for the concert this evening. Would you like to come with me?
  #Person2#: Sure. Thank you very much.
  #Person1#: Then I'll pick you up at six thirty. OK?
  #Person2#: Ok, see you.
  #Person1#: See you.