Dear John Smith，

　　I am Li Hua，now a student in Britain. I am writing to you as to the volunteering work in Dogs Trust.

　　I've just read about a notice on the Internet，saying you need some volunteers during the summer vacation. I hope I can help with your work. To tell the truth，I have loved to take care of dogs since I was a child，so I wish to be offered the chance. My summer vacation is from June 28 to August 30，2014，and every day I can spend more than two hours in the center to attend the dogs or assist the training classes. I think the time with the lovely dogs is wonderful. Meanwhile，by volunteering I can gain work experience and confidence when dealing with problems.

　　I'd appreciate it if you could let me work for your Dogs Trust. And hope to hear from you pretty soon.

　　All the best.

　　　　　　Yours，

　　　　　　Li Hua