Diarize Me keeps track of all appointments that have been cancelled. You can access these from the reports section.
To do this, click on 'My Business' and then on 'Reports':
For 'Report Type', choose 'Appointment Report' and then choose 'Cancellation Report' for the report sub type. Remember to choose the date range and report format you want the report in. You are able to view the report 'On Screen', or download it as a PDF or Excel file: