Dear Sir or Madam:
I am responding to your job offer on December 20, 2005. I was informed that I would be offered the position as an interpreter for your company. I cordially appreciate your trust and I am much obliged to you for providing me with this valuable opportunity.
However, I have to tell you that I cannot accept it. The major reason is that I don’t think I am the most appropriate candidate for this post. As a non-English major, though my written and spoken English are outstanding than most of my peers, I am not well trained in translation, not to mention interpretation, which, I believe is highly demanding. Maybe my performance in the oral examination has misled you. Actually, I am more interested and more competent in my own major, that is, program designing. Last but not least, I happened to have been offered such a position with another company.
Nonetheless, I, again, want to express my sincere gratefulness and I earnestly apologize for any inconvenience hereby caused. Finally, I hope you can find the ideal candidate as soon as possible.
Best regards.