Can I help you , sir ?   Yes , I'd like a book about law .   Would you tell me the name of the book and the author ?   Uh , the Origin of Law . And it's written by Professor Felix of Harvard .   I'm sorry . It's out of stock now . Could you come by again next week ?   Next week ? It is too late . I need it urgently .   Well , then , is it convenient to leave your phone number so that I can inform you as soon as we restock it ?   No , thanks any way . 