"Oh, we've been keeping him out, seems like you were having fun." He doesn't even know who Dean is, really, but he's committed to the bit now.

Was there a chair on the other side of the desk before? Doesn't matter if there was, because there's one now for Crowley to pull out and drop into, kicking his feet up onto the desk as if he's settling in.

"You're human, aren't you? You'd think force of habit would get you up and about." Considering they're in the North Pole and all myths now, apparently, he's stopped caring about playing at being human.