Which guests have apartment bookings with status code "Confirmed"? Return their first names and last names.
SELECT T2.guest_first_name ,  T2.guest_last_name FROM Apartment_Bookings AS T1 JOIN Guests AS T2 ON T1.guest_id  =  T2.guest_id WHERE T1.booking_status_code  =  "Confirmed"
guests with apartment bookings having status code 'Confirmed' refer to joining the Apartment_Bookings table with the Guests table on a common guest_id and filtering where booking_status_code = 'Confirmed'; returning their first names and last names refers to selecting guest_first_name and guest_last_name from the Guests table.