answer: #Person1# wants to buy mittens, but #Person2# says they are out of stock.
documents: #Person1#: Is there anything I can do for you? 
  #Person2#: Yes. I am looking for a pair of gloves. 
  #Person1#: What about this one? It's the latest. 
  #Person2#: Excuse me, but I want a pair of mittens. 
  #Person1#: I am sorry, it's out of stock right now.