Reminds me of a story of a guy I know. He lost a bet and so as a forfeit he had to go up to 50 girls one evening and open with the line, "Hi, I'm Damon. Wanna fuck?"
He got ignored about half the time, received a mouthful of abuse from a few others, had a few boyfriends threaten to kick his ass and bizarrely enough he got a couple of numbers, made out with a couple of girls and even slept with one of them. He said they were the later ones he asked so I attribute two factors to this:
1) It was late, everyone had a few drinks, was wearing beer goggles and inhibitions were lower both for him and the girls.
2) After the first 30 or so approaches he had done this so many times that it was no longer a big deal for him and he didn't care what the girls thought of him so he probably came off as nonchalant and confident.
Bottom line - there is no magic set of words that will make that girl leap into bed with you. If there was everyone would be using it. It's not what you say, it's how you say it. Don't be needy or sleazy, be confident, interesting and interested.
Of course I am home on a Friday evening nursing a cold and surfing the forums so don't listen to me 😀