[a short, surprised silence, before he cracks a warm smile that makes him look twenty years younger. or, well, in his case-- a few thousand years younger.]

My, that's not something I get to hear too often. Thank you -- you flatter me.

[he doesn't miss the way she's been scoping the shelves, so he tilts his head slightly and adds:] Was there... Something in particular that you came here to find?