answer: Fiona tells #Person1# she's lost about ten kilos by going on a diet.
documents: #Person1#: Hi! Fiona? I almost didn't recognize you. You are much thinner since I last saw you.
  #Person2#: Yes. I have lost about ten kilos.
  #Person1#: How did you do it?
  #Person2#: I am on a diet. And I do more exercise regularly.
  #Person1#: What's the secret then?
  #Person2#: It lies in perseverance.
  #Person1#: Well. It's hard for me. I can't keep doing exercise.
  #Person2#: You should have a try.