You can cancel requests for items that have yet to be approved by following the below steps.
Cancel pending requests
From the EmpowerID navbar, expand Tasks and Requests and select Navigate to the My Tasks App portal for your organization.
From the My Tasks app, click the Pending Item button for the pending request you want to cancel.
From the Overview tab of the card that appears for the pending item, click the Cancel Request button.
Click the Confirm button to confirm you want to cancel the request.
...