I really don't try to. I think it happens unintentionally. If I seem like I'm flirting with someone...chances are I am completely joking or that I'm not really interested in that person, in that way. I mean...ugh it depends haha. When I really like a guy, I am so unbearably awkward. Oh god. It's awful. I suddenly develop a slight case of...deafness and I have to keep asking him to repeat things or I respond to him in a way that makes absolutely no sense, and I then I end up eating an entire bowl of limes.
But that's another story.
I remember in middle school I apparently developed a reputation as a flirt because I would pick on guys. I was serious though! My humor is not dry and witty when I actually like someone, because I sound like an idiot when I try to be alluring.
The one time (the night with the limes) that a guy laughed with me at my unbearable awkwardness...I found out he had a girlfriend literally 10 minutes after I thought, "Heyyy he wasn't completely turned off by my anti-flirting." Hence the limes.
To answer the question...no I do not flirt intentionally. I apparently do it when I talk to people I'm not even interested in, and I am incapable of doing it when I actually like the person or find them attractive. This is my life. Welcome.