Several things are important here: confidence, humor and the ability to interest. Girls sense insecurity and boredom, so the main thing is to be natural, but also a little mysterious. The platform itself also plays a role. For example, on
videocamchat it is easier to find people for live communication, because there are real users, not bots. Try different approaches: start with a light compliment, make a joke, show interest in the person you're talking to - then she won't want to switch!