Thank you for offering me the position and a great opportunity. I appreciate your effort and willingness to discuss the detail and give me the time to consider the offer. It such a great opportunity as you are having a great organization and many aspects of the position that are very appealing.
however, I'm unable to accept the offer since i just sign up a new project in which i have put much potential to it. I'm grateful that you will understand my decision. This project in hand is the priority that needs to be accomplished which will be helpful for my future career to build on my knowledge and experience.
thanks again for taking the time to consider my candidacy. I hope our paths will cross again in the future.
Sincerely,