answer: #Person2# has to meet the supervisor but will mail the letter to #Person1# after that.
documents: #Person1#: Would you mail a letter for me? My hands are full.
  #Person2#: Oh, I am sorry. I'm afraid I can't do it now. I have to meet my supervisor in a few seconds. But I could mail it after that.
  #Person1#: That's fine. We're going to drop in and see Jimmy tonight. Don't forget it.
  #Person2#: I won't.
  #Person1#: Thanks. See you.
  #Person2#: Don't mention it. See you.