Here's a line in action:
Imagine for a second that it's the weekend and you're taking the bus to see some friends, as you look out the window, you see a girl get on the bus.
As luck would have it, she sits next to you.
Wow, you think to yourself. She's gorgeous.
Without missing a beat you say:
"You’re so cute, it’s distracting me from thinking about whether or not I should ask for your number"
She smiles, blushes and looks away all embarrassed.
The line worked.
It made a great first impression.
Now all you need to do is ask for her number or continue the conversation.
Ideally, you'd use something called a "timed delay" which is where you say "I need to get off the next stop, but I'd love to take you out for a drink sometime".
What this does is place some pressure on her. If she doesn't give you her number, she might not ever see you again, because you're getting off so soon.