Astoria went ahead and ordered herself a drink, just water, as she waited, toying with the straw every now and then to occupy herself and her hands. Every time the bell jingled over the door, she perked up, but for awhile it was just a random person. And then finally he came in.
Seeing him reminded her of the stupid school girl crush she'd had when they were both attending Hogwarts. He was older, refined, one of the Slytherin 'leaders' in the clique, and very good looking. What wasn't there to like? It was something she never expanded on and clearly it wasn't all gone.
She waited until his eyes scanned in her direction and she waved with a smile, trying her best to seem casual and irresistible when then wasn't how she felt at all. When he was close enough to hear her, she said, "Hi," and immediately thought it was a bit lame. But what else could she have said?