Thanks for your email and it's an hornor for me to have this opportunity. I will arrive at your office on time.
See you then.
签名
正文：
Dear Mr. XX / Ms. XX：
Thank you for your letter regarding the position available in your organization.
I am writing to express my keen interest in the position of （职衔）. The goals outlined for the position are well-matched to my abilities, and I consider it a privilege to join your team.
I would be glad to make myself available for an interview at your convenience. Please contact me if you have any questions or need any additional information.
Thank you again for your time and consideration. I look forward to hearing from you.
对方既已发信给你，请尊称对方的姓氏，以示尊重。