One possible version：
Dear wang bin，
I’m very glad to hear you are considering coming to study in our school。But you are worrying about the canteen service 。as you know ，our school is a key middle school of the province。The head is very concerned about us students’ health as well as our studies。So they pay much attention to our diet。
Firstly，the quality of the dishes is always good ，and it has veen improved greatly recently。There are a lot of delicious dishes served every day。
Secondly，the price is reasonable 。as the headmaster says，the canteen is not for profit ，it provides us a balanced diet and make us healthy。
In addition ，the environment is attractive 。we all have meals in a great hall equipped with enough tables and chairs ，so we can enjoy our meals comfortably in the canteen。

略

One possible version：
Dear wang bin，
I’m very glad to hear you are considering coming to study in our school。But you are worrying about the canteen service 。as you know ，our school is a key middle school of the province。The head is very concerned about us students’ health as well as our studies。So they pay much attention to our diet。
Firstly，the quality of the dishes is always good ，and it has veen improved greatly recently。There are a lot of delicious dishes served every day。
Secondly，the price is reasonable 。as the headmaster says，the canteen is not for profit ，it provides us a balanced diet and make us healthy。
In addition ，the environment is attractive 。we all have meals in a great hall equipped with enough tables and chairs ，so we can enjoy our meals comfortably in the canteen。

略