answer: #Person2# teaches #Person1# to use cell phones and reminds #Person1# of paying the phone bill.
documents: #Person1#: I read the instructions, but I'm still not sure how to use my cell phone.
  #Person2#: Actually, it's pretty easy. First of all, don't forget to turn it on.
  #Person1#: Got it!
  #Person2#: Then dial the number. And remember to press the 'send' button.
  #Person1#: That's all?
  #Person2#: Pretty much. Just make sure to recharge the batteries every few weeks. And try not to drop it. It's fragile.
  #Person1#: Good advice.
  #Person2#: And one more thing: Be sure to pay the phone bill every month!