I thank you for your letter no. ____________,dated ____________,together with two copies of letter of appointment. I accept the terms and conditions mentioned therein and have pleasure in informing you that I will report for duty on ____________ (Date).
Enclosed please find the duplicate copy of the letter of appointment duly signed by me.
I thank you once again for having given me a chance to serve in your organisation and I assure you, sir, that I will do my best to give you entire satisfaction.