answer: #Person2# teaches #Person1# the process of using the machine to buy a drink. #Person1# agrees with #Person2# that sometimes the machine needs more tries.
documents: #Person1#: I've never seen a machine like this before and need some help. 
  #Person2#: Sure, no problem. What are you trying to get? 
  #Person1#: I want to buy a drink. 
  #Person2#: OK. This machine needs you to use that change machine first to get correct change. 
  #Person1#: I've got the correct change already. 
  #Person2#: First you put your money in the dollar slot or the coin slot. The dollars have to be smooth. 
  #Person1#: OK, what next? 
  #Person2#: Just know that sometimes the money doesn't go in perfectly the first time and you have to try again. 
  #Person1#: OK, next? 
  #Person2#: Choose what you want and push the button. Sometimes it takes a couple of tries. 
  #Person1#: I agree with you. 
  #Person2#: Hope that works for you!