A bit of annoyance flickers across the Doctor's face. Well, it doesn't quite flicker. It starts to, and then the annoyance gets stalled and sort of... stays. "I'm sure it is. Enjoy it."

He flashes him a bright, entirely false and possibly mocking smile, and turns to leave. He's not at all in the mood for chit-chat, and he's not about to stick around and engage in it with someone he doesn't know at all.