answer: #Person1# got a letter from an old friend. #Person1# and #Person2# agree it's hard to keep in contact with old friends.
documents: #Person1#: I just got a letter from an old high school buddy.
  #Person2#: Really? That's nice.
  #Person1#: He usually keeps me posted.
  #Person2#: I've been completely out of touch with my old friends.
  #Person1#: It's hard to keep up contact when people move around so much.
  #Person2#: Yes, people just seem to drift apart.