You can first say a friendly reminder that once the goods are sold, they will not be returned. Thank you for your cooperation, and then explain why. When telling you that tobacco and alcohol sales are not refundable, you can first say a friendly reminder that once the goods are sold, there will be no refund. Thank you for your cooperation. It can give customers a reminder and give consumers a psychological hint. Then explain the reason to the customer. For example, we can say that our tobacco and alcohol products are discounted and will not be refunded after purchase. I hope that all major consumers can be familiar with it before buying. This is a good saying.