I have an amazing line for female engagement. It works pretty much 100% of the time, the phrasing of it they just love.

If you don't reply quickly often women are so desperate to hear the answer they will even message again.

It is simple. Here is an example:

M: You look Italian.

F: haha, no I'm Spanish.

M: Spanish eh - IS IT TRUE WHAT THEY SAY ABOUT SPANISH GIRLS?

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Now obviously, this can be swapped in for different nationalities / jobs - anything really.

True what they saw about lawyers / nurses / Americans etc etc.

I have followed up with various flirty responses over the years but I wanted to hear if anyone had any good ideas for a great response.