answer: The book #Person2# urgently needs is out of stock. #Person1# will inform #Person2# as soon as it is restocked.
documents: #Person1#: Can I help you, sir?
  #Person2#: Yes, I'd like a book about law.
  #Person1#: Would you tell me the name of the book and the author?
  #Person2#: Uh, the Origin of Law. And it's written by Professor Felix of Harvard.
  #Person1#: I'm sorry. It's out of stock now. Could you come by again next week?
  #Person2#: Next week? It is too late. I need it urgently.
  #Person1#: Well, then, is it convenient to leave your phone number so that I can inform you as soon as we restock it?
  #Person2#: No, thanks any way.
  #Person1#: You're welcome.