Dear (guest name variable)
we would like to thank you for your reservation in term (arrival + departure date variable) in (hotel name variable) and we hope that you have enjoyed your stay here.
We would also like you to come back sometime in the future and we decided to give you a free 15% discount coupon, which you can apply in your next reservation.
Discount coupon: xxxxxxxxxx
Coupon is valid until: xxxxxxxxxx
You can use coupon in first step of reservation process on our webistes (insert link to your websites)
(hotel name variable)
(contact phone variable)
(contact email variable)