if a girl is interested and you are confident, it doesnt really matter what you say or do
some dudes hate complimenting women or even being corny. I personally have no problem getting to the point and being honest with why I'm hollering.
I'd probably walk by every day until I catch her then go in and say "excuse me. sorry to bother you but i came in here to buy something and I just thought you were mad pretty (or gorgeous, beautiful, whatever...). What's your name?". Then I'd introduce myself and say I'd love to get to know her better and ask if shed be down to grab lunch (or coffee) sometime.
I put up prime Albert Pujols numbers with this kinda approach during my mid 20s and if I wasnt single I'd still be putting in work
So yea, liek OG
@The ADD said...dont over think it. Even if she rejects you, with the above approach she will let you down easy and I guarantee your blood will start boiling and youll be ready to pounce / talk to any attractive women you come across
PS: If she wearing a name tag, skip the introduction and call her by her name to get her attn. The element of surprise is important; the more you catch her off guard the better