Hey Cupcake. I am quite good at flirting. Uhurm. Don't ask me how I could say this because God might strike me down with scarlet thunder. So here's my flirting guideline:
1. Appear to pay attention to your target. When ever you see him/her, praise him/her to high heavens. Nice hair, nice butt (just kidding), nice clothes. Notice a haircut, ask him/her how he/she is doing.
2. Appear to bump into him/her, 'accidentally, ' and light up when you see him/her (you could practice in front of the mirror).
3. Use the power of casual touch. Tapping the target on the shoulder, standing close to the target, or squeezing the target's butt (again, just kidding) are indications that you like him/her physically, and hopefully the target will get the hint.
4. Emphasize your assets. I love and hate to say this, but I dare suggest you use your body and its wondrous beauty to get noticed. As John said, toss you hair, perk up your breasts, bend over (this sounds so devilish).
5. The final and most important step: talk sexy and talk about sex. (*wink*)
Good luck, and let me know how it went!
^_^