answer: #Person2# has lost about five kilos because #Person2# exercised and was on a diet. #Person2# advises #Person1# to go to a gym.
documents: #Person1#: I really need to lose some weight. I should go on a diet.
  #Person2#: I think you should work out more too.
  #Person1#: Wow! You are much skinnier since the last time I saw you.
  #Person2#: I have lost about five kilos.
  #Person1#: How did you do it?
  #Person2#: I was on a diet and exercised daily.
  #Person1#: I hate working out.
  #Person2#: You can try a low-impact workout schedule. Why don't you go to a gym?
  #Person1#: Good idea. Then the trainer will help me to make a fitness plan. Besides that, what's your secret?
  #Person2#: The secret is persistence.