"Silver Streak" question

After years of watching it, I can quote most of this movie verbatim, with the notable exception of the part where George orders dinner on the train. He speaks French while ordering, and I’ve always wondered something about that scene. After he’s finished placing the order (which includes a bottle of wine), the waiter says in a very solicitous manner, “Very good, sir!”

What I’ve never been able to figure out is, does he really mean that? I can see a few options here: [ul]
[li]George’s French is really outstanding, and the waiter wants to acknowledge it.[/li][li]George ordered a really outstanding wine, and the waiter wants to acknowledge it.[/li][li]The waiter sees George is up to bat and wants to help him look good in front of the lady.[/ul][/li]Alas, neither my French nor my knowledge of wine is sufficient to help bolster either of the first two notions, so I have always assumed it was the last. Can anyone who is familiar with French, wine, and this movie help me out?

Thanks in advance!

I just figured it was that waiter’s way of saying “Yes, sir.”

At the more upper-scale establishments I’ve (infrequently) visited, “Very good, sir” is a standard response from the wait staff after you’ve ordered.