answer: #Person2# cannot remember the Johnsons no matter how #Person1# describes them.
documents: #Person1#: The Johnsons are on their way back. You remember them, don't you? 
  #Person2#: Johnson? I can't place them. 
  #Person1#: We met them in Bermuda last May. 
  #Person2#: They've completely slipped my mind. 
  #Person1#: The couple with the dogs, think back. 
  #Person2#: No, I don't recall a thing about them. 
  #Person1#: Well, I've invited them for brunch. 
  #Person2#: Hmm, I must be getting absent-minded.