中美中学生交流项目安排一批美国中学生来华体验中国文化，在网上挑选适合住宿答的家庭。假如你是友谊中...

Dear Smith
How are you
I'm ---.The student from(介绍你是几年级的、学校），I heard that you will be organized a group of American high school students to experience Chinese culture in recent time, therefore, I feel very happy, and represent China to welcome you. I am a outgoing girl, like singing, read a book, English,(你的爱好）frankly, i am looking forward an American friend to my home ,so do all my family,also very glad to share the Chinese culture with them,so I sincerely hope you can give me a chance, thank you！
yours
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我知道你们将组织一批美国中学生来华体验中国文化，为此，我感到非常开心，并代表中国欢迎你们的到来。我是个性格外向的女孩，喜欢唱歌、看书、英语，所以这次特别期待能有个美国朋友能到我家做客，并把我所知道的中国文化与他们分享，希望你们能给我一个机会，谢谢
（要是你家里有人走的文艺范的工作，最好，可以加在中间）

One possible version
Dear Sir,
I am writing to request the valuable chance to be one of the homestay families for the American students.
My parents, who are kind and easy-going in nature, are in favor of my idea that I host an American student. We live in a beautiful community. Luckily, we have extra room for guests. I am a student of Xinhua middle
school, open-minded and enthusiastic. What's more, I'm quite good at languages and we can communicate
well in English.
If an American student stays with us, I'll be a good guide to some local places of interest and some typical
towns and villages in our area. My parents and l will help her/him to make Chinese meals, such as jiaozi,
noodles and other foods.
We have the confidence to make the American student feel at home and have some sweet memories.
Looking forward to your reply.