Task: Text to Code
Input (English): SQL: SELECT T1.customer_name , T1.customer_phone FROM Customers AS T1 WHERE T1.customer_id NOT IN ( SELECT T2.customer_id FROM Customer_Orders AS T2 )
Feedback: In step 1 Replace customer orders with mailshot customers .
Output (English): SELECT customer_name ,  customer_phone FROM customers WHERE customer_id NOT IN (SELECT customer_id FROM mailshot_customers)