dear mr.smith:
it's with much regret that i'm writing to inform you that i'd like to quit my current position at David as a typist.the main reason of my departure is that i've just moved house to a far away location,which has resulted in a very long and inconvenient commute for me.i'd like to give the company a 30 day notice and during this time i will make sure that i hand over my work the best way i can.it has been a pleasure to work at your company.
i appreciate very much your kind consideration of my request.
sincerely,
xxx