answer: #Person1# wants to buy a fridge and asks about Higher products. #Person2# strongly recommends it and offers a detailed introduction.
documents: #Person1#: I'd like to buy a fridge. What about the quality of higher products? 
  #Person2#: I strongly recommend it. As an international enterprise, it produces high quality household appliances. 
  #Person1#: Is there a warranty? 
  #Person2#: Yes, all their products have warranties. 
  #Person1#: How long is it? 
  #Person2#: The fridges is covered by a one-year warranty. 
  #Person1#: Which model is the best seller of this year? 
  #Person2#: This one. How do you like it? 
  #Person1#: It's too big for me. Could you recommend something else? 
  #Person2#: Sure, this way please.