Which customers do not have a first notification of loss record? Give me the customer names.
SELECT customer_name FROM customers EXCEPT SELECT t1.customer_name FROM customers AS t1 JOIN first_notification_of_loss AS t2 ON t1.customer_id  =  t2.customer_id
Hangi müşterilerin ilk kayıp kaydı bildirimi yoktur?Bana müşteri adlarını ver.