Creating a new table with auto-generated Time against expression

Hi,    So I have data like this:  User Logon Time Logoff Time Person A 03/04/2020 10:00 03/04/2020 12:00 Person B 03/04/2020 9:00 03/04/2020 11:00 Person B 03/04/2020 11:00 03/...