answer: Alex tells Mark about his flight, the layover, and the things he bought in the duty-free stores.
documents: #Person1#: Hi, Mark! Long time no see!
  #Person2#: Hi, Alex!
  #Person1#: Where have you been?
  #Person2#: I just got back from London.
  #Person1#: How was your flight?
  #Person2#: It was OK. There was a lot of turbulence, though.
  #Person1#: That ' s too bad. how long was the flight?
  #Person2#: It was 10 hours.
  #Person1#: Did you have a layover?
  #Person2#: Yes, in paris, France.
  #Person1#: Did you buy anything in the duty-free stores?
  #Person2#: Yes. I bought two boxed of chocolate? one for me and one for you!
  #Person1#: Oh, you didn ' t have to...
  #Person2#: It was nothing.