[It's too much to hope for, really, that she's willing to change her mind about traveling again after only a few minutes in his company. So he's not all that surprised that his asking gets to her to reply in the way she does - at least, when it comes to her wanting to go back again.

As much as he's trying not to hope, though, her mentioning being possibly being able to handle a trip or two does wind up sparking just a bit of it in his heart, and he can't help but respond with a touch of enthusiasm.]

Aye, we can make the Doctor prove that he's actually able to fly the TARDIS for once! Besides, if you did, your room's just the way you left it. Zoe's using another one, so there's no worries there.