What's good guys!

I've got a bit of a problem, and that is my seeming inability to cold approach well.

I can do well for myself when it comes to meeting new people, so long as there's some sort of situational context at hand. For example, if I'm at an acting convention, cold approach isn't that difficult because I can start talking about their stage history or what workshops they've been to; or the one time the storm outside got so bad we had to go into the basement of the cafe I was in, ended up flirting with a cute Russian girl I'd been wanting to approach.

But then things like this morning happen. I'm at a Starbucks, waiting in line, and I see this adorable girl up at the counter. I place my order, walk past her with a smile and some good eye contact to set my things down.

Walking back up to claim my drink, I walk up to her.

Me: Hey, I know you're probably headed to class, but I wanted to introduce myself. What's your name?

Her: (Questionably) Amanda.

Me: (Extend my hand) Dillon, pleasure. I thought you were cute, so I at least wanted to introduce myself.

Her: (Smiles) Oh, well thank you.

-Scene-

This situation happens a lot, and I don't know how to follow up. This girl is cute. I want to learn more about her. But I have no idea what to say coming out of the cold.

What you guys think?