Letter to invite a keynote speaker

At some point in your speaking career you are going to get your first letter to invite you to be a keynote speaker. It will probably look something like this:

Dear Speaker:

Our committee has reviewed your demonstration materials, references and contract details. We are pleased to inform you that you have been selected as our keynote speaker for the XYZ conference January 28th, 2xxx.

We are also interested in the educational materials you have offered to provide.

Please contact us to go over the contract details.

Sincerely, 

Professional speaking book