Dear Mr. Principal,

I am a student in our school. I want to talk about the canteen service in our school.

The canteen service in our school has three advantages. First, our canteen is clean, second, the food is delicious, and third, the service attitude is good.

But it also has some disadvantages. For example, the price of food is high, there are few varieties to choose from, and the waiting time for buying food is too long.

In my opinion, we can invite our students to the canteen to help. We can ask students to list their favorite foods and let the canteen cook them.

I hope more and more students will like our canteen service.