My ATCO licence cost me money, as does my medicals held at Gatwick and my FISO licence & my A/G licence cost me money, so - yes... in many ways, I pay his/her salary! lol
But, seriously, I've always found the nicer you are (including flirty) the more you get.
And for what its worth - it did impress my mates, and it continues to be my most impressive and successful chat-up line.
I figure one day (with a chance of 2400/60,000,000) I will use that chat-up line with the response - "me too!"
;-)