Variable for User Mail Text

What's the best way to handle/set the variable for user_mail_text?

For example, the profiler builder output is:

 variables[user_mail_cancel_confirm_body] = [user:name],

A request to cancel your account has been made at [site:name].

You may now cancel your account on [site:url-brief] by clicking this link or copying and pasting it into your browser:

[user:cancel-url]

NOTE: The cancellation of your account is not reversible.

This link expires in one day and nothing will happen if it is not used.

--  [site:name]

Only [user:name] is inputted into the database.