Cancel a Day Off Request
You can effectively make yourself available again and your manager will have your latest availability next time they make the schedule.
If you are a manager and you need to remove a day off request, read here.
First, check the status of the request. If you decide that you no longer want the day off, you can tab over to your days off requests and open a request. Tap the cancel button and the request will be removed so that your regular availability will kick in with regards to you potentially being scheduled.
Important: Managers have the authority to schedule you whenever they need to. Therefore, make sure that you regularly check the schedule and make sure that you are at work when you are required to be there.