【正确答案】
Dear Guests,
   First let me express my sincere appreciation for your long-time faith in our hotel, in order to improve our service, we are now collecting your opinions about every aspect of our hotel, including reception service, restaurant service, room service, and reservation, etc. Apart from that, if you have good suggestions, please let us know. And your opinions and suggestions will help us to improve our service and make your stay here a more pleasant one.
   Thanks for your cooperation. Hope you have a nice stay here.
Sincerely yours,
Guest Service Manager