answer: #Person2# refuses the cake for #Person2# is on a diet to control cholesterol.
documents: #Person1#: Would you like a piece of birthday cake?
  #Person2#: No, thanks, I'll pass. It looks very tempting though.
  #Person1#: I thought strawberry cake with cream cheese frosting was your favorite?
  #Person2#: It is. I'm on a diet and strawberry cream cheese cake is not on it.
  #Person1#: A diet? What for? You are in great shape.
  #Person2#: I went to the doctor the other day. My cholesterol is up.
  #Person1#: Oooo. This sounds serious.
  #Person2#: Not too serious. But he gave me a strict diet to help bring it down.