if (isset($form_modify) && isset($form_flight_id) && isset($form_class_name)) {
echo $form_modify;
} elseif (isset($form_cancel) && isset($form_flight_id) && isset($form_class_name)) {
if (isset($form_modify) && isset($form_flight_id) && isset($form_class_name)) {
echo $form_modify;
} elseif (isset($form_cancel) && isset($form_flight_id) && isset($form_class_name)) {
redirect("index.php?page=reservations", 3);
} else {
echo "Make an error message. <br>";
redirect("index.php?page=reservations", 3);
} else {
echo "Make an error message. <br>";