[Prompto's first thought is: Cute girl!!! Followed shortly after by 'is that a holographic keyboard???', a stutter when he sees the wings on her back and then finally the whole voice to text thing. Oddly after the weird day with eagle-people and fish-people popping up everywhere the whole Wings thing is just, well, water off a ducks back really. The voice to text makes him think sadly of his friends back home so he puts on a deliberate bright smile and amps up his excitement. It's really the cool tech that breaks him.]

O. M. G. Forget the drink, did that keyboard just pop up out of nowhere? Is that like tech or just a you thing? Uuuuh... that wasn't rude, right?

[Dammit Prompto stop sticking your foot in your mouth around the cute girl!]

I am so sorry.

[On multiple levels. He rubs the back of his neck and gives her a bashful smile to hopefully lighten his rudeness. Maybe, since she's been teasing, she won't mind. She seems nice enough.]