Order confirmation pop up in two step checkout process for order guide.

Hi Team,

The order confirmation pop up in the two step checkout process is having the 'requested for' field which references the sys_user table and it shows the name of the user two times. If I do the checkout for the catalogue item, the same pop up shows the user id and the user name. Could you please let me know how to make that pop up show up the user id and user name for the two step checkout process in the order guide. The issue is at the service portal end. How to edit the drop down list so that it shows user id and user name?
Any help will be appreciated. I tried looking for Client script and Business rules on RITM table but unable to find any clue to edit that field.