answer: #Person2# tells #Person1# #Person2# failed the exam again because #Person2# copied Smith's paper, whose marks were even lower than #Person2#'s.
documents: #Person1#: How about your exam?
  #Person2#: I failed again.
  #Person1#: Why? Did you oversleep again?
  #Person2#: No, I didn't.
  #Person1#: Then, what's wrong with you?
  #Person2#: Oh, I can't tell you.
  #Person1#: Tell me. Maybe I can help you.
  #Person2#: Nobody can help me.
  #Person1#: Don't say things like that. Tell me your trouble. We are good Mends, aren't we?
  #Person2#: Yes. It's something like this. This time, I made full preparations, but Smith told me he could get perfect marks. I decided to copy his paper and I did copy, though not completely. It turns out that his marks were lower than mine. And we both failed.
  #Person1#: lt serves you right.