answer: #Person1# apologizes to #Person2# for losing #Person2#'s book. #Person2# doesn't mind.
documents: #Person1#: I'm sorry, but I can't find the book you lent me.
  #Person2#: That's OK.
  #Person1#: I really feel bad about it. Let me buy you a new one.
  #Person2#: No. Don't be silly. I wouldn't dream of letting you do that.