I need to put my customer's logo in the reservation print attached. How can I do? Thanks

Hello,
I have to decide to buy your component as soon as possible. Can you answer my post urgently?
Thanks

I'm reading the documentation and using the free version of Bookit in order to buy it for golf tee-time booking. Normally the players will pay online when they reserve a tee-time, but some kind of players don't pay at all wnhen they reserve..
Does your product manage this situation,. I sippose a coupon code that allows a discont (100 %) would suite the requirement.
Thank you a lot
Elisabetta