[The fact that she asks is enough to deplete the amusement entirely. He stares at her for a moment, unsure of how to react before deciding playing it off as she's only concerned from the trial is the best way to go.]

We've all been a little busy, don't worry about it. [He even tries for a reassuring grin. Elizabeth knows a little more about him than other people. He can try to be somewhat kind to her.] I'm still here, aren't I? No aliens yet, I'm valued for the week...what more could I ask for?

[He says with sarcastic words sarcastically.] You believe that, don't you?