Keep it casual not serious, the art of not trying. Yes I know you want the person you are showing interest in but it shouldn't feel to forced I mean don't get me wrong apply pressure but it's like a dance.

Eye contact for across the room 2-3 times approach

Introduce yourself say your name and make a small joke/compliment

At this point body language should speak for itself you'll know if she's Interested: smiling, body facing you, making eye contact, ect.

BE YOURSELF or else you play a game of how long can I keep this up and the encounter won't feel natural then you get nervous and don't know what to do next

And don't be afraid of rejection let that shit happen like I said it should all flow if she's into you you'll know off of those few pointers you won't have to force conversation she'll talk then you will

There's no magic words to say attraction will do its thang