Missing Method in ProgramsController

Error: The action booth_assign.php is not defined in controller ProgramsController

Error: Create ProgramsController::booth_assign.php() in file: app/controllers/programs_controller.php.

<?php
class ProgramsController extends AppController {

	var $name = 'Programs';


	function booth_assign.php() {

	}

}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_action.ctp.