answer: #Person1# complains to John that Terry and Susan arrive late for dinner. John suggests #Person1# give a call to them to check if they're in.
documents: #Person1#: John, it's 7:30. I wonder how much later they are going to be?
  #Person2#: Oh, you know Terry and Susan. They never arrive on time.
  #Person1#: Yes, but half an hour late! My dinner will be ruined.
  #Person2#: Oh, maybe they got stuck in traffic. You know what the traffic is like at this time of day.
  #Person1#: Yes, but they said they were taking the subway so they wouldn't get caught in traffic.
  #Person2#: Well, they shouldn't be late then. Why don't you give them a call and see if they've left. Maybe they forgot about the invitation.
  #Person1#: They couldn't have forgotten about it. I was just talking to Susan last night. Anyway, let me just check if they are in. Their number is 2143556.