The below email template is for sending to a user who wishes to cancel their Personal subscription and the purchase was made before 24May2023, Store 2.0.
Email template:
Thank you for contacting JMP! We understand that you wish to cancel your JMP Personal Subscription. While we hate to learn that, the good news is that you will continue to have access to the software through the end of your subscription period.
To prevent future renewals, please follow the steps outlined in the FAQ section on jmp.com/mysubscriptions. I have pasted an image of the applicable item below for your convenience.

Note: For Store 2.0 cancelations, see How to cancel a JMP subscription - purchases made after 24MAY2023