[Cain gives her a neat nod, holding his hand out for a handshake.]

My name is Ciaphas Cain. [Remembering that the other guards had first accidentally and then very intentionally called him by his given name, he follows up to clarify.] -but just Cain, please.

And that is an extremely kind offer. I may just take you up on it—assuming you weren't just being polite? [He asks it very kindly.]