answer: #Person1# and #Person2# buy a sun mat from #Person3#.
documents: #Person1#: It's fine weather, isn't it? 
  #Person2#: Yes. It's so lovely to have a sun bath here. 
  #Person1#: Do you have sun mats here? 
  #Person3#: Of course. How many do you want? 
  #Person1#: Just one, please. 
  #Person3#: Anything else? 
  #Person1#: That's all. Thank you.