no-show (n.)

also no show, "someone who fails to keep an appointment or claim a reservation," by 1941, from no + show (v.), in the "show up, appear" sense. Originally airline jargon, in reference to the commercial airlines' no-show list, of "people who make reservations, are in a great hurry and say they will pick up their tickets at the field. Then they fail to call in and cancel their seats and never show up at the field." ["Popular Aviation," December 1934]