Dear Sir or Madam
I am writing 
this
 letter to express my feelings about your restaurant 
I went there on Saturday night with my classmates.It was the most beautiful and comfortable restaurant I have ever seen. There were three floors and comfortable chairs.We really liked its dishes and cups.I want to go there again sometime in the future. 
We went there on Saturday night because we all were free and it was Linking Words
anniversary
 Correct article usage
the anniversary
that
 we finished school ten years ago so all Correct word choice
when
of 
thirty of my classmates were there so l never forget that day.
Change preposition
apply
Moreover
,we liked your food and service.We ordered Linking Words
two kilogram
 palov and three portion kebabs.We ate them with appetite and l liked your service especially.All of your waiters were conscientious and Add a hyphen
two-kilogram
kindly
.They tried to be liked by customers Change the word
kind
as 
they can so they talked kindly Correct word choice
apply
with
 customers and acted fast.
I hope l will go there again in the future.
Yours sincerely 
LazizChange preposition
to