Dear Mr. Bower
I want to thank you for the invitation to speak with your students about their local and regional history. I must commend you on your efforts to ensure the young people of our community have a deeper understanding of the culture and history of the towns they call home.
Although I would love to discuss this subject with your students, I am afraid I will have to decline the offer. I will be attending a book publishers meeting in New York City on the 27th and will be there most of the day. I would like to ask for a rain check to speak with your students at a later date.
Thank you for your consideration and I do apologize for the conflicting schedule.