answer: #Person1# is assisting #Person2# finding a book which has been taken, and reserves the book for #Person2#.
documents: #Person1#: What can I do for you?
  #Person2#: I was looking for a book, but I couldn't find it.
  #Person1#: Did you check our database to see if it was on the shelf?
  #Person2#: I already did.
  #Person1#: Is it on the shelf?
  #Person2#: I didn't see it.
  #Person1#: Apparently somebody took that book out of the library.
  #Person2#: Will you ever get another copy?
  #Person1#: We will definitely be getting another.
  #Person2#: Could you please reserve it for me?
  #Person1#: That won't be a problem.
  #Person2#: Thanks. I really appreciate that.