Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE Clients (Customer_Name VARCHAR, Client_ID VARCHAR); CREATE TABLE Bookings (Customer_ID VARCHAR); CREATE TABLE Clients (Customer_Name VARCHAR)
### Question:
Show the names of all the clients with no booking.
### Answer:
SELECT Customer_Name FROM Clients EXCEPT SELECT T2.Customer_Name FROM Bookings AS T1 JOIN Clients AS T2 ON T1.Customer_ID = T2.Client_ID