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Dialogue Practice: Buying a Book

Alice: Can you help me find a particular ........., please? It is a story about a fictitious government conspiracy and is by Dan Crown.
Cashier: Yes, I can help you find it. It is in the ......... section. I have to help one customer and then I can meet you in that section and help you find it.
Cashier: Did you find it? Alice: No, I wasn't able to ......... it. Can we look together?
Cashier: We certainly can. Oh, by the way, are you looking for a hard......... version of the book?
Alice: No, I am looking for a ......... back version. The hard-backed books are more expensive than I can afford.
Cashier: I don't know if we have any paperback versions of that book. We may be ......... out of those for now. Let's look, though, and see if we can find you one.
Alice: Oh! There it is! Since it is the day after Christmas, is there a ......... available on this book? Or is there any other kind of sale going on?
Cashier: No, there isn't. It is a ......... book and we don't offer discounts for those. We only offer discounts on new books.
Cashier: We don't have a discount but we do take .........-ins. We will give you one used book for every two you bring in and give to us.
Alice: I understand. I'll do that the next time I come in. As for the purchase, does your store take ......... cards? That's all I have on me at the moment.