resignation

Date:
Dear Mr. ,
As required by my contract of employment, I hereby give you one week's notice of my intention to leave my position as Platform Assistant.
I would like to express my thanks to this great company and my fellow co-workers. The success I have had here has opened new doors for me, it would be foolish for me not to seize these new opportunities.
Please be assured that I will do all I can to assist in the smooth transfer of my responsibilities before leaving.
I wish both you and company every good fortune and I would like to thank you for ...