Steven finds it extremely complimentary that Jon would assume he is in LA on important business, and it's hard for him to admit that that is not really the face. He screws up his face indecisively, trying to figure out how he can not sound like a loser.

"Well...not exactly..." Being babysat is so not badass. "I mean...there's no specific mission...yet." Ah, there he goes. He leans back, looking more confident. "I'm here for precautionary reasons, of course!"