Wants to add more information in alert generated through SQLDM

Hi Team,

I wants to add more information in alerts generated due to SQLDM. for example - if I got alert for session taking long CPU then I got below things in the alert building in email:

$(Timestamp), $(Metric) on $(Instance) and host $(Hostname) is $(Severity).

$(AlertText)

$(Metric): $(Description)

Where $(AlertText) replaced with information like "SQL Server instance xyz - Session 52 which logged in at 1/17/2018 7:11:00 AM has a cumulative CPU time of 125.611 seconds since login."

What I want is "SQL Server instance xyz - Session 52, loginName abc from Application Server AppServerName which logged in at 1/17/2018 7:11:00 AM has a cumulative CPU time of 125.611 seconds since login."

thank you!