[And yes, Sebastian has been noticing such the entire time. He's also got cutlery up his sleeve from the cafeteria, so he doesn't quite think what Yoh's doing is a bad idea.]

That is very kind of you to say, sir. I don't believe I've made your acquaintance as of yet. My name is Sebastian, and in ordinary circumstances I have been acting as the butler of the household. Currently, however, it seems my services are not needed.

Are you a recent arrival yourself?