Hello,
Thodoris Bais here, Founder & Leader of Utrecht Java User Group. Our community has been growing a lot during the last [#] years, so, I would like to kindly ask you to help us continue this initiative by providing us with [number] free ([name of the ticket]) ticket.
We will perform a draw in a few days from now.
Of course, we will promote the event, as proof of cooperation, as much as we can.
Best Regards, Thodoris Bais