answer: #Person2# didn't find the book that should be on the shelf. #Person1#'ll get it from another library.
documents: #Person1#: May I help you?
  #Person2#: I would like to find this book.
  #Person1#: Is there a problem?
  #Person2#: I don't think you guys have it.
  #Person1#: You should look it up on our computer.
  #Person2#: I did that.
  #Person1#: What came up?
  #Person2#: It should be on the shelf, but I didn't see it.
  #Person1#: I can try to get the book from a different library.
  #Person2#: I didn't know you could do that.
  #Person1#: I will call you when I find it.
  #Person2#: I appreciate your help.