假如你是李华，请就本校食堂服务（canteen service）的状况给校长写一封信。内容包括：优点、不足；建议食堂干净，价格偏高，尽快解决问题饭菜可口，种类偏少，服务态度好，等候时间较长，词数：100左右；开头和结尾已为你写好。
Dear Mr.Principal.
I am  a senior student of our school. I’dlike to say something about the canteen service in our school.
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Sincerely yours,
Li Hua