If you want to check to see if a clients booking has been deleted or not, you can do this by accessing the 'Deleted bookings'
In order to do this, click on menu and go to 'Reports'
Top right of the screen is ''Downloadable", click on this.
Next select the dates you want via the date selector. Select first the start date and then the end date
Then click the 'Download' button for the Deleted booking log
This will be downloaded into your 'downloads' file on your computer and will show which clients appointments have been deleted.