answer: Alexandra thinks Robbie's new walkman is wonderful and that Robbie's family is nice, which causes Alexandra to miss her family. Robbie invites her to eat something to cheer her up.
documents: #Person1#: Robbie, this new walkman is really wonderful.
  #Person2#: Richard and Marilyn bought it for me for my birthday.
  #Person1#: They are so kind. You are very lucky, Robbie, to have such a nice family.
  #Person2#: Is something wrong, Alexandra?
  #Person1#: No, nothing.
  #Person2#: Yes, there is. I can tell. What's the matter? Come on, you can tell me. What's up?
  #Person1#: I received a letter from my parents this morning. I miss them very much. The Molinas treat me so nicely and I like being with your family so much...but when I received the letter with photographs of my family, I cried.
  #Person2#: You really miss your family,don't you?
  #Person1#: Yes, I know I must seem silly. It's not like I have nobody. I like the Molinas very much, and they're so kind to me.
  #Person2#: Hey, why don't we go out for a hamburger and French fries? That'll cheer you up. And you can use my walkman.
  #Person1#: That's a good idea. But if you go out, please don't complain about your math teacher or your math homework, I want to have fun.