Most Helpful Girl
In the short time that you have talking to her, just try to tell yourself every time you see her, pick up one piece of info about her. Ask one question. Like "so do you live on campus?" Boom, she'll say yes or no, and you'll know. "So you have any classes today?" and so on. Best advice I have for ya. Good luck.
Most Helpful Guy
If you want her to know your name, make a joke about whether she's going to write it on the coffee like they do at Starbucks.
Honestly, though, if someone is working, I leave them alone.