Coorporate chair massage Introduction letter

Dear All,

I am new to this forum. I am so glad to be the member of this community. I hope I would be able to learn and share some wonderful experience with everyone here.

I want to send a chair massage introduction letter to companies to promote my service and benefits. I would like to invite myself to spend half a day at the company to perform a trial chair massage to their  employees to promote my service.

I just don't  know what exactly to put in this letter, I've been looking for templates to have an idea but I haven't found anything, any help would be great.

Thank you so much for all you help and input.

Warm regards

Christyn