Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE first_notification_of_loss (customer_id VARCHAR, service_id VARCHAR)
TABLE: CREATE TABLE customers (customer_name VARCHAR, customer_id VARCHAR)
TABLE: CREATE TABLE services (service_id VARCHAR, service_name VARCHAR)

### Question ###
Find the names of customers who have used both the service "Close a policy" and the service "New policy application".

### Accurate SQL ###

SELECT t1.customer_name FROM customers AS t1 JOIN first_notification_of_loss AS t2 ON t1.customer_id = t2.customer_id JOIN services AS t3 ON t2.service_id = t3.service_id WHERE t3.service_name = "Close a policy" INTERSECT SELECT t1.customer_name FROM customers AS t1 JOIN first_notification_of_loss AS t2 ON t1.customer_id = t2.customer_id JOIN services AS t3 ON t2.service_id = t3.service_id WHERE t3.service_name = "New policy application"