show me the customer name of the order that have the status "cancelled"
select t1.customer_name from customers as t1 join customer_orders as t2 on t1.customer_id = t2.customer_id where order_status = "Cancelled"
name the customer which have  15 as customer id?
select customer_name from customers where customer_id = 15
find the customer name of the order that have status "delivered"
select t1.customer_name, t2.order_date from customers as t1 join customer_orders as t2 on t1.customer_id = t2.customer_id where order_status = "Delivered"
yes
select t2.order_date from customers as t1 join customer_orders as t2 on t1.customer_id = t2.customer_id where order_status = "Delivered"