Ticket Price Not Multiplied By Space

/**
This snippet will output flat price regardless of ticket spaces choose.
*/
function my_em_ticket_is_available($booking_price, $EM_Ticket_Booking, $add_tax){
  if( $force_refresh || $EM_Ticket_Booking->ticket_booking_price == 0 || $add_tax !== 'x' || get_option('dbem_bookings_tax_auto_add') ){
   $booking_price = round($EM_Ticket_Booking->get_ticket()->get_price(false, $add_tax), 2);
  }
  return $booking_price;
}
add_filter('em_ticket_booking_get_price','my_em_ticket_is_available',10,3);