Take a look at how to create a servicenow catalog data lookup definition against either a Catalogue item itself or a variable set assigned to an item. See how we use a source variable (in our case a user) as a matcher and subsequently set another variable (an email address for this example) with an attribute retrieved from the matcher table (sys_user). All this is achieved with NO code!!
Who needs GlideAjax???...well..you still need it if you want to grab a dot walk attribute. :)
Enjoy!
https://docs.servicenow.com/en-US/bun...
https://docs.servicenow.com/bundle/qu...
#servicenerd
#servicenow
#nocode
#nocodeplatform