[Ren recognizes Louis. But since this was a new world and he had already met someone he knows who had forgotten about Avalon, he's careful not to actually be too familiar with him.]

Ah... let me guess, they put meat in your meal? I can take it off your hands, sure.

[It's a normal thing to say seeing as he's a deer. He doesn't need to know who he is to say it.]

If you want, I can pay for your next meal. That way you don't lose out on any money.