Add the user and request details to the mail body in Workload Management rule

We need a feature to show RequestID and UserAccount automatically in Mail body when triggering the rule limit in Workload Management.

For example, 
I add a rule for Request Lifetime Limit and set the action to EMAIL.
I would like to use parameters in mail body to get system variables.
In my imagination, the mail body will be like:
" Request  lifetime exceeded  limit.
   The Request ID is $request_id, and the request came from USER: $user_account. "