How to flirt with a flight attendant?

I'll be traveling tomorrow for 12+ hours, I'm pretty sure I'll be bored so I'd like to flirt just for fun. Nothing too serious. I'm usually very flirty, but I don't know why, FAs intimidate me a little. So do you have any tips? I'm not looking for sex, or anything, just a pleasant conversation with a (hopefully) cute guy.
How to flirt with a flight attendant?
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