Using current booking report, you could see all the shifts that are booked by the agency on basis of many filters available as shown below. 

For instance, if you would like to get a list of all shifts booked by a selected staff in a selected time frame, Current booking report will do that for you with the ability to filter the shifts on basis of many other factors available in this screen as shown above. 

Exporting to excel will enable you to generate a very detailed report in which you can manually apply Filters to the columns you want and  hide the unwanted columns.