answer: #Person2# says #Person1# didn't put enough money in the machine despite #Person1# believing otherwise.
documents: #Person1#: I put in two quarters for a coke, but nothing came out of the machine.
  #Person2#: Really? Let me check it.
  #Person1#: I'm sure it's broken.
  #Person2#: No, ma'am. I'm afraid you put in only one quarter and one dime.