answer: #Person2# thinks yoga class is too expensive so #Person2# decides to take exercises on #Person2#'s own to lose weight.
documents: #Person1#: I want to lose some weight!
  #Person2#: So do I!
  #Person1#: I have a yoga class tomorrow. Do you want to come with me?
  #Person2#: No, it's too expensive for me. I've decided to take some exercises on my own.
  #Person1#: What are you going to do?
  #Person2#: Run around the track. In the morning I run for an hour, and in the afternoon I run around the building.
  #Person1#: Good, I am sure it will work if you can persist.
  #Person2#: I hope so. Would you like to join me?
  #Person1#: Sounds good!