answer: #Person2# is biting #Person2#'s nails because #Person2# is nervous about exams, which annoys #Person1#. #Person1# comforts #Person2#.
documents: #Person1#: Come on. Will you please stop biting your nails?
  #Person2#: Sorry, I just can't help it.
  #Person1#: But it's annoying.
  #Person2#: I don't mean to annoy you. I feel so nervous.
  #Person1#: Why?
  #Person2#: I feel nervous every time I take examinadons.
  #Person1#: Just relax. I used to feel the same way, but now I can handle exams easily.
  #Person2#: How do you make it?
  #Person1#: Well. I attended some lectures on taking exams.
  #Person2#: That works? What's the importance?
  #Person1#: Well, you should know that you've been working really hard. And the most important thing is that you should know that the world wouldn't end if you fail.
  #Person2#: Ok. I'll have a try and see if it works.