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
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 <table_name> : Clients col : Client_ID | Address_ID | Customer_Email_Address | Customer_Name | Customer_Phone | Other_Details row 1 : 423 | 201 | branson94@example.net | Clifford | (042)912-3404x5135 | VIP row 2 : 426 | 383 | alba04@example.com | Bettye | (604)849-0214 |  row 3 : 478 | 15 | westley30@example.net | Reinhold | 1-048-214-4640x64380 |  row 4 : 508 | 98 | hudson.kristina@example.net | Jack | (966)022-6448x3428 | Super VIP row 5 : 509 | 286 | white.alysa@example.com | Rosanna | (651)611-6111x61144 |  row 6 : 527 | 74 | buddy98@example.org | Kelton | 581.457.6800 |  row 7 : 591 | 98 | considine.shyanne@example.net | Connor | 1-479-550-1510x89172 |  row 8 : 605 | 15 | strosin.keara@example.com | Garfield | +63(3)8897932425 |  row 9 : 628 | 383 | cconn@example.net | Urban | 405.225.1435 |  row 10 : 631 | 374 | qaltenwerth@example.com | Vita | 1-299-766-5382x3122 | VIP row 11 : 699 | 98 | lbalistreri@example.net | Rory | 1-431-563-2576x9849 |  row 12 : 735 | 110 | dina.gutmann@example.net | Arvid | (745)818-8559x747 |  row 13 : 768 | 369 | rempel.jamison@example.com | Consuelo | (729)754-0764x6020 |  row 14 : 775 | 383 | jklocko@example.net | Alvis | +12(5)4915316228 |  row 15 : 776 | 374 | lacy92@example.com | Tevin | 08761812417 |  row 16 : 868 | 74 | boyer.carleton@example.com | Krista | (066)903-6363 |  row 17 : 887 | 39 | vparker@example.net | Genesis | 1-121-643-1101 |  row 18 : 938 | 180 | cleora.strosin@example.org | Horace | 935-161-0948x33010 |  row 19 : 943 | 39 | kbailey@example.com | Marquis | 398-003-6983x1691 |  row 20 : 953 | 362 | conn.josiane@example.com | Malcolm | (995)964-6385 | <table_name> : Bookings col : Booking_ID | Customer_ID | Workshop_Group_ID | Status_Code | Store_ID | Order_Date | Planned_Delivery_Date | Actual_Delivery_Date | Other_Order_Details row 1 : 1 | 938 | 140 | good | 8 | 2016-12-12 10:43:01 | 2013-03-10 18:47:05 | 1997-11-21 10:07:40 |  row 2 : 2 | 868 | 838 | stop | 7 | 1976-08-20 00:33:08 | 2009-07-09 09:18:38 | 1976-01-08 07:19:23 |  row 3 : 3 | 735 | 176 | good | 9 | 1975-11-23 06:28:47 | 1989-01-05 19:24:45 | 1990-03-16 19:38:47 |  row 4 : 4 | 527 | 708 | stop | 6 | 1995-02-02 15:52:57 | 2017-04-27 00:16:00 | 1996-10-24 21:15:27 |  row 5 : 5 | 591 | 176 | good | 9 | 1995-05-10 14:49:47 | 1979-07-19 19:44:01 | 1971-01-13 13:24:52 |  row 6 : 6 | 953 | 735 | good | 1 | 1992-11-26 18:11:10 | 2016-06-06 20:35:14 | 2016-04-30 11:45:39 |  row 7 : 7 | 735 | 954 | stop | 4 | 1975-12-30 14:12:32 | 2008-07-18 18:15:40 | 1983-10-09 10:48:48 |  row 8 : 8 | 605 | 176 | good | 2 | 1992-05-11 23:22:41 | 1973-04-02 03:10:21 | 1983-07-01 22:10:19 |  row 9 : 9 | 508 | 405 | good | 4 | 1971-05-11 06:53:01 | 1974-05-07 21:40:39 | 1986-10-04 13:31:10 |  row 10 : 10 | 938 | 735 | good | 4 | 1982-05-19 05:37:51 | 1999-05-11 01:26:06 | 1989-11-17 00:32:13 |  row 11 : 11 | 423 | 136 | good | 4 | 1991-10-11 17:24:15 | 1978-04-10 12:23:59 | 1983-02-07 20:27:10 |  row 12 : 12 | 776 | 954 | good | 5 | 1984-12-17 12:53:51 | 2014-06-05 10:19:46 | 1985-09-02 11:34:39 |  row 13 : 13 | 605 | 685 | good | 6 | 1996-09-14 10:17:55 | 1993-04-17 23:53:01 | 1982-04-18 02:59:08 |  row 14 : 14 | 426 | 954 | stop | 6 | 2007-08-05 15:46:29 | 1971-06-29 03:04:47 | 1995-12-21 05:01:38 |  row 15 : 15 | 426 | 176 | stop | 8 | 1976-10-24 07:40:47 | 1972-06-25 15:51:34 | 2004-02-22 04:37:14 |
col : Customer_Name row 1 : Alvis row 2 : Consuelo row 3 : Genesis row 4 : Marquis row 5 : Reinhold row 6 : Rory row 7 : Rosanna row 8 : Urban row 9 : Vita