You can reject a request with status “New” or “Approved”. To reject the request, click the checkbox next to the request(s) then click the Reject button or select Reject from the Actions menu next to the request, the following window appears:

If request reasons are configured for the selected request type, the window appears as shown in the below example:

Select the reason for rejection and enter your comments, then click Reject. Its status changes to “Rejected”.