"Alright, alright! One second, let me just..."

A note is hastily added to the numbers he's running, and at last, Jon emerges from the back, straightening out his jacket. As soon as he gets a look at the counter, it's clear by the way that his face drops from confusion to a flicker of embarrassment that he'd assumed Arthur had been sat at one of the tables, not right there for the entire exchange. Oops.

He clears his throat a bit, shaking that embarrassment as best as he can, and offers a hand to shake.

"Hello, ah--- Mr. Lester?"