It's nice to be friendly to customers.
Mike is a cashier at a grocery store and Bill just finished paying for his groceries.
Mike wants to end the transaction with Bill.
Mike tells Bill thanks for shopping with us, and he hopes he sees him again soon and then hands him the receipt.
Mike tells Bill that the transaction is complete, gives him a receipt and tells him to move along quickly for the next customer.
Bill feels like a valued customer and that Mike really cares whether he shops there or not and is happy to be treated that way.
Bill is annoyed that he's being rushed through and that Mike seems robotic in trying to pump through customers.