answer: #Person2# is worried about #Person2#'s niece Helen because she's no longer outgoing and her study goes backward. #Person1# comforts #Person2# that it's natural for children to become shy in adolescence.
documents: #Person1#: You look very anxious this evening. Is there anything wrong?
  #Person2#: I'm worried about my 15 year old niece Helen.
  #Person1#: What's worrying you.
  #Person2#: I've seen a big change in her. She used to be very outgoing and sociable, but now she is having problems with other children at school. Now, she is totally someone else.
  #Person1#: Really?
  #Person2#: Yes. Now, she is quiet and doesn't want to talk to anyone else. Her teacher said things are going backward in her study.
  #Person1#: Her parents must be very anxious about her.
  #Person2#: No, not really. Both of them are too busy to worry about their daughter. I think I need to talk to them and ask them to spend more time with Helen.
  #Person1#: Take it easy. It is something natural. I was outgoing when I was a little girl, but became very shy in teenage years. So don't be nervous about your niece.
  #Person2#: Maybe you are right, but I will talk with my brother anyway.