When an official rejects a game -- the assignment can be deleted by an Officials Coordinator and then re-assigned on the Officials Assignment page. If the Official is having difficulty confirming games, the Officials Coordinator can click the green Checkmark next to the assignment to confirm on the officials behalf.
(a) This article assumes your using the publishing model where officials can sign in and confirm or reject game assignments.
(b) The delete is not necessary if you want to keep track of the rejection.