A leave request that has not been approved can be withdrawn from circulation. In the Dashboard, in the MY DOCUMENTS component, under the ABSENCES section, find the relevant request and open it. To withdraw the request, click WITHDRAW FROM WORKFLOW in the top left panel, enter a justification, and confirm by clicking OK. Select the person you want to notify about the withdrawal and confirm by clicking OK.

You can find more information on this topic in the article: Withdrawal of a non-approved leave request.