Dear Mr. Andrews,
This letter is to inform you and the company that I have received an invitation by another company that will enable me to do what I have always wanted to in my career-sales. I have decided to take up the opportunity.
I am therefore tendering my resignation from Miami Sweets Company. My last working day will be 30th July 2007. This gives a notice period of 2 weeks.
I would wish to thank you for the support and experience that I received while working under you. It was truly an honour to receive guidance and training by you in this company. My cell phone number remains the same. Feel free to call on it.