[解析]
Dear Committee,
Thank you for taking your time to read my letter. I really hope to be a volunteer for the International Tourism Festival in our city.(提出申请)
I am Li Hua, an outgoing girl of 17 years old in Senior 2 of Xi'an Middle School. (个人信息)I'm interested in travelling and have visited many places of interest. I have a good knowledge of our city's history, so I will be not only a servant but also a carrier of our splendid culture.【高分句型一】 What's more, English is my favourite and best subject. Last year I won the first prize in the oral English contest for high school students in our city. I think it easy for me to communicate well with the foreigners.(自己的兴趣爱好与特长或相关经历等)
I'll be too glad to work for our city if I am given the opportunity. I'll be surely devoted to the job, making the foreigners more familiar with our city.【高分句型二】(自己的承诺)
Looking forward to your early reply.(期盼回复)
Yours sincerely,
Li Hua