You can add a new booking to the system using the admin panel at the Booking > Add Booking menu page. 
You can select the date(s) in a calendar fill the booking form fields and press the submit button for the creation of new booking. 

Booking Calendar Personal and higher versions. 
At the paid versions You can select the "booking resource" at the top of the page, so you can select at what exactly resource you are want to make the bookings. 

Booking Calendar Business Medium/Large versions. 
At the Business Medium/Large versions in additional you can select the specific custom form at the top of the page, so you be able to make the bookings for the specific booking resource, using the specific custom booking form. 

Terms:  add booking, new booking.