[You're dealing with someone who's treated like little more than a living machine, or perhaps a slightly-above-averagely intelligent animal-- he's accustomed to following orders and commands, not to acting under his own volition. As such, waiting for permission is only expected, and the Dog seems as mildly confused by the other's reaction as Crowley is himself.]

Oh.

[But like the member of the Nine, he shrugs it off with relative ease-- this person is as good as royalty, but he's no Company employee. Is no doubt unaware of the protocol he usually follows. As such--]

My apologies, Sir. You'll have to forgive me, but being what I am, I'm accustomed to waiting for said permission. But if that's the case...enjoy the rest of your evening.

[And he will turn away this time, head back in the direction of his designated charge.]