answer: #Person1# wants tickets on March twenty-first, but there are only the most expensive tickets left. #Person2# also says $25 for the twentieth are all sold out. #Person1# thinks the $35 ones on the twentieth would be the best.
documents: #Person1#: My son's just tried to book some tickets for the Black Key Concert on March twenty-first, but there's a problem with your website.
  #Person2#: I'm sorry about that. There are only the most expensive tickets left for that date, I'm afraid.
  #Person1#: What about the twentieth? Have you got any for $25?
  #Person2#: Sorry, those are all sold out. But there are some on the nineteenth, or there are $35 ones on the twentieth.
  #Person1#: Yes, those would be best. The nineteenth is no good because he's got school the next day.