Changing Default Ticket Type

<?php
/*a
 Updated snippet to set Default Ticket Type
*/
function my_em_add_default_tickets($tickets, $EM_Bookings) {

    if ( empty($tickets->tickets) ) {
        $ticket_data = array();

        $ticket_data[0] = array('ticket_name' => 'Basic', 'ticket_description' => 'Basic Member', 'ticket_spaces' => 10, 'ticket_price' => 450, 'ticket_min' => 1, 'ticket_max' => 2 );
        $ticket_data[1] = array('ticket_name' => 'Accelerated', 'ticket_description' => 'Accelerated Member', 'ticket_spaces' => 10, 'ticket_price' => 375, 'ticket_min' => 1, 'ticket_max' => 2);
        $ticket_data[2] = array('ticket_name' => 'Premium', 'ticket_description' => 'Premium Member', 'ticket_spaces' => 10, 'ticket_price' => 350, 'ticket_min' => 1, 'ticket_max' => 2);
        $ticket_data[3] = array('ticket_name' => 'Free', 'ticket_description' => 'No Charge', 'ticket_spaces' => 10, 'ticket_price' => 0, 'ticket_min' => 1, 'ticket_max' => 2);

        foreach ($ticket_data as $ticket) {

            $EM_Ticket = new EM_ticket();
            $EM_Ticket->ticket_name = $ticket['ticket_name'];
            $EM_Ticket->ticket_description = $ticket['ticket_description'];
            $EM_Ticket->ticket_spaces = $ticket['ticket_spaces'];
            $EM_Ticket->ticket_price = $ticket['ticket_price'];
            $EM_Ticket->ticket_max = $ticket['ticket_max'];

            $tickets->tickets[] = $EM_Ticket;
        }
    }

    return $tickets;
}
add_filter('em_bookings_get_tickets', 'my_em_add_default_tickets', 100, 2);