"Ah, yes, of course." He turns towards her car, lifting his hand theatrically. "Lead me away in your chariot."

He's smiling, joking: but like this new body of his, it's all a fake, a show. Unlike this new body, it has a clear purpose: to entertain and disarm the other person. It's a common tactic of his, a mask he can slip into so easily that he can wear it flawlessly regardless how angry or sad he feels.