@DamkerngT. you can come with n number of possibilities to have someone telling me that! I'm afraid I cannot include all! When the question is general, I'd certainly answer in a general way. OP's straightforward question is 'how to respond' such sentence. It can come from anyone's mouth -right from a gf to a teacher and even a stranger! And yes, I'd certainly answer that way to my ex teacher and trust me, here, they'll still like my answer! :) — Maulik V ♦ Jan 5 at 5:13