answer: #Person1# is asked to do warm-up exercises before swimming. #Person2# explains that people's legs may spasm out of control when swimming and also talks about how they ensure people's safety.
documents: #Person1#: Hello, is it necessary to do warm-up exercise? I can't wait to dive into the water.
  #Person2#: I'm sorry. Every customer coming here must do the warm-up exercise before getting down to swimming. That's out regulation.
  #Person1#: Yeah, I see. You are just doing your job. But I wanna know what the advantages it has.
  #Person2#: OK, lovely boy. Try to be patient. Do you know the danger of swimming without warm-up?
  #Person1#: As far as I know, people will be weak if they swim too long.
  #Person2#: That's right. But the most dangerous thing is that their legs may spasm out of control when swimming.
  #Person1#: Is it very dangerous? I'm a little scared. Do you offer the lifebuoy for us?
  #Person2#: Yes, besides that, we also provide our customers with goggles, swimming suit and something like that.
  #Person1#: Do you have the workers to save me if anything should happen?
  #Person2#: Of course, all the workers here are able to swim, and they will come to your aid quickly.