Customizing appointments list in WP-Admin

We would like to customize the columns output on the appointments list in WP-admin. Our logged in users are making bookings on behalf of others but we can only see the user name in column3 :
in the 2nd column instead of Client--which is the user account making the registration--we want the output from the name field in the appointment record and of course keep the ability to edit the record with the show/hide on mouse over.

We would also like to drop Provider column.

Are either of these possible?

Thanks!