Dear Tom,
I have read your advertisement and I would like to get a vacancy of a helper in your school. I plan to work in Great Britain this summer and I think that it will be a good experience for me. I have not been in Britain yet, but I will not give you many troubles because I am quick-witted, active, energetic and well-educated person.
I am good organizer and ready to help you with different outdoor activities. I will try to do my best in any sort of job.
I am not afraid of difficulties or unlimited workday and I am ready to offer my help in any time.
Best wishes,
(твое имя)
