[His life has been leading up to this moment... Deer wrangling. Surely it's not as bad as getting tossed into the sun by a horse or kidnapping a chocobo! So there's no real hesitation when the question is posed, and he gives a smile and a thumbs up.]

You got it! These guys are pretty gentle, so you should be able to get one on without any trouble if you just go slow.

[He's ready to beat up a rainbow deer if it gives Dia any trouble, though.]