answer: David has resigned because he can't bear the rudeness of his boss and Susan decides to open a dance school once she has moved to the top.
documents: #Person1#: Hi, David. I haven't seen you for ages. How are you getting along with your work?
  #Person2#: Hi, Susan. Not so well as to be expected. I've left my position. I can't bear the rudeness of my boss any longer.
  #Person1#: What are you going to do then?
  #Person2#: No idea. Anyway, I've got to think about it seriously. And you?
  #Person1#: I've been very successful as a dancer. I like this kind of life. It is so exciting.
  #Person2#: You can't do that forever.
  #Person1#: No. But I've decided to open a dance school once I've moved to the top. A lot of young dancers need better training.
  #Person2#: That's a wonderful idea.