answer: #Person1# comes back to #Person2#'s shop where #Person1# bought vases yesterday to buy more souvenirs. #Person2# assists #Person1# to choose a few postcards for #Person1#'s sister, some masks made in Venice and some chocolate for #Person1#'s girlfriend.
documents: #Person1#: hello, do you remember me? I bought some vases from you yesterday. 
  #Person2#: yes, you sent them to New York, right? 
  #Person1#: that's right. I thought I'd come back to buy some more souvenirs. 
  #Person2#: what did you in mind? 
  #Person1#: well, first, I'd like to buy a few postcards. My sister used to always send a postcard to herself whenever she went anywhere. I want to do that, too. 
  #Person2#: we have plenty of postcards to choose from here. The same designs can be found on these posters. 
  #Person1#: posters are difficut to travel with. I think I'll just buy the postcards. I heard that you might also have some of the masks that are made in Venice. 
  #Person2#: yes, we do. They're on the wall behind you. 
  #Person1#: how much do they cost? 
  #Person2#: the prices are clearly marked on the back of each mask. Would you like me to get one down for you to look at? 
  #Person1#: yes, I think I'd like the green mask in the middle. 
  #Person2#: here you go. 
  #Person1#: I'll take it, I'd also like to buy some chocolate. 
  #Person2#: are you looking for some homemade chocolate as a gift. 
  #Person1#: yes, it's my girlfriend's birthday today and she loves chocolate. 
  #Person2#: we've got plenty to choose from here. 
  #Person1#: they look delicious. I think she'll be pleased.