How to flirt at a restaurant?

Hey everyone! I saw a girl working at a restaurant a few weeks ago who I thought was really cute. The restaurant was the type where you order at a counter and then the food is brought out to you at your table. Anyway, I ordered with this girl and I almost got the impression she was shy in front of me. She fumbled a bit while typing and even made a little comment to me about it.

Later, I walked by her and we had one of those moments where you both are in each others' way so you kind of stop and try to go the opposite direction- not easy to describe :) Anyway, she kind of smiled and looked down as she walked by.

So, I just want to ask 2 things. 1. Do you think there was any interest? 2. What could I do to start a conversation with her in this environment to give me the chance to ask her out?
How to flirt at a restaurant?
Post Opinion