answer: #Person1# tells Anna that #Person1# has to meet a buyer so they can't go to the play. Anna wants to go on Thursday, but #Person1# is not available.
documents: #Person1#: Something important has just happened at the office, Anna. So I can't meet you for lunch. After all, I'm afraid.
  #Person2#: What is it?
  #Person1#: I have to meet an important buyer at the airport.
  #Person2#: That's really annoying? What about the play tonight? You promise to go with me. I already have my mother take care of our kids.
  #Person1#: Yes, darling, I promised, but I'm afraid we'll have to cancel it.
  #Person2#: What about Thursday. Could we go then?
  #Person1#: I think all the seats will be booked up. And anyway, I'm afraid I won't have time next week.
  #Person2#: I've telephoned the theater. The seats aren't all booked up in fact.
  #Person1#: Well, as I've just said, I am booked up.