i suggest going direct with your intentions.

first you gotta preframe yourself

you:"hey there!"
HB: (surprised or shocked reaction)
you: "youre the most beautiful girl i seen....in the last 15 mins" (Push-Pull)

you: i just have to say you look very sexy today,you have a nice (ass,breast,etc)

just look up
sasha daygame,james marshall or alan rodger currie -youtube

these guys really help