answer: David is depressed because his girlfriend spoke ill of him. #Person1# suggests David forgive her.
documents: #Person1#: David, why didn't you clean the room?
  #Person2#: I'm not in the mood.
  #Person1#: Why are you feeling depressed?
  #Person2#: I was told my girlfriend was speaking ill of me. That's a real let-down.
  #Person1#: I don't think she will do such a thing.
  #Person2#: But she did and made me disappointed.
  #Person1#: Oh, cheer up. A girlfriend is not everything.
  #Person2#: But she means a lot to me.
  #Person1#: Then forgive her mistake.