answer: Lily is unhappy because she argued with her mum about her lack of pocket money. #Person2# suggests Lily talk with her mom calmly.
documents: #Person1#: Are you OK, Lily? You don't look very happy.
  #Person2#: Oh, David. I had an argument with mum again. I'm not getting enough pocket money.
  #Person1#: How much do you get?
  #Person2#: Five pounds a week.
  #Person1#: That sounds reasonable to me.
  #Person2#: Well, I'm 14 and if you are going to town shopping, you can never have enough money. Everything is so expensive.
  #Person1#: But is it fair amount of money? Compare what your friends get.
  #Person2#: Well, we all get the same. But I have to buy all my music things as well things for school and have hardly anything left to spend on clothes.
  #Person1#: Right. Do you have to help around house?
  #Person2#: Not really.
  #Person1#: So you don't have to do anything for this pocket money.
  #Person2#: Mum said if I did that I will never have time to do my school work.
  #Person1#: Has she said you can have more pocket money when you are 15?
  #Person2#: Well, Mum just says she'll decide when I'm ready to have more. And I've just got to wait.
  #Person1#: Maybe you should sit down with her and say 'How can I prove that I am old enough to get more?'
  #Person2#: So, I should talk to her again.
  #Person1#: Yes, but don't argue with her. Just discuss it calmly.
  #Person2#: OK, thanks.