How do I flirt on stage?

I’m in a musical, and in one of my scenes I’m in the background and the director asked me to briefly flirt with a woman. I’ve never been in a relationship before, I’m on the autism spectrum, and I’m pretty much clueless on how to flirt. I know this shouldn’t be as hard as real flirting, but how do I get it across to the audience that I’m flirting with this woman for maybe like five or ten seconds?