I'm applying this season so my advice might be useless, but I adapted my emails from another, highly successful applicant's. The format generally followed ashiepoo72's. I personalized my emails, altering my academic interests depending on the particular focus of the POI. You might want to retype every email if you're paranoid about making a mistake, like I was. I also had different constructions prepared depending on the occasion (if I was being referred to someone else by the first person I emailed, for example). General email advice holds, I think: keep it brief, be polite, etc.