There are many sources out there on how to create an online dating profile, and how to form the right messages. A lot of them are free. What I am showing is just some general principles to abide by.

First message: Send an introduction message: At least 3 sentences long.
Second Message, if she qualifies herself: Ask for the number.
Second message, if she does not qualify herself: Ask her a qualifying question.
Third message: Ask for her number

If she ignores your qualifying question move on. If she does not give you the number when you ask for it move on. You do not need to go any deeper than this online. There are guys out there with fake profiles, and women who like to play games and string guys along forever. Some women are not comfortable giving their number out online that's why you make them qualify themselves. It builds comfort.

Send out at least 10 messages a day like this to women who you like and you will fill your phone up quickly.

_________________
I am a hunter of human excellence. I seek out those individuals who break the norms
and demonstrate to all of us what’s really possible. I learn what those few
extraordinary individuals do that’s different from everybody else, and then emulate
them.

I find sending a message like,

"Want to do sushi, drinks and karaoke?"

Works pretty well too.

Filter to the girl in question.