The Buyer: Sorry, but I have thrown it away. Is it necessary?
The Seller: I am really sorry, but I can do nothing without the sales check for this disk.
The Buyer: Well, then I will have to complain to your chief executive officer. Please ask for him.
The Seller: He is now on the business meeting and can not come. But I will consult with our guarantee department manager. Maybe we can solve this problem