answer: #Person2# lies to #Person1# because it's April Fool's day, which reminds #Person1# that tomorrow his wife's birthday.
documents: #Person1#: I need to go to the bank.
  #Person2#: But they are closed today.
  #Person1#: Closed? Are you kidding? What is it, some kind of holiday today?
  #Person2#: Have you already forgotten? What's the date today?
  #Person1#: Oh, it's the first of April, April fool's day
  #Person2#: You forgot all about it, didn't you?
  #Person1#: So I have, but I has reminded me at least one thing I need to remember.
  #Person2#: What's that?
  #Person1#: Tomorrow is my wife's birthday.
  #Person2#: Better not forget that, so kill you if you don't get her something.