Do you have a booking that is similar to an existing one? Maybe it only differs in the date? In this case, you can just copy the existing booking and adjust the details.
Go to your Personal Dashboard. Underneath the status of an existing booking you will find the button "Copy Booking".
The Booking Overview of your new, copied booking will appear, and will include the same details as your existing booking. Now, you can change the date or other details like the Artist Fee. Don't forget to "Update Booking" to save the changes. You have now created a new booking without having had to enter every single detail!