We don't accept tips, thanks. It's my pleasure to serve you. 谢谢，我们不收小费。能为您服务是我的荣幸！
We don't accept tips but I'm very grateful to you. 我们这儿不收小费，但是我仍很感谢您。
We don’t accept tips. Thank you just the same. 我们不收小费，但我仍然要谢谢您。Oh, sorry, sir. We take no tips here. 真抱歉，先生，我们不收小费。