We are using extensionAttribute10 for our seating chart. Example cc03-3000 that is one user cube number. I am trying to find a code to move one user

We are using extensionAttribute10 for our seating chart. Example cc03-3000 that is one user cube number. I am trying to find a code to move one user from cube 3000 to cube 4000. Any help? I am trying to add this script into ServiceNow