Knave and Refl3x are both right about this!

However you have to do it in a way that you feel comfortable. Obviously Refl3x has louder flirty interaction, whereas Knave takes a more sensitive approach, both work well for each person

I usually try to lead the conversation from the bat off to avoid that from happening if there's a group, let's them know that I'm the leader and that I have value.

If it's 1-2-1 just interject, joke/wind her up about what she's saying so it puts her on the back foot and she can't go too fast.

If she's talking to you more than you're talking to her then your battle is half won as unless you are being awkwardly quiet girls expect guys to do most of the talking with initial interactions.