if ($_SESSION['action'] == "readReview") {
     unset($_SESSION['listOfReviews']);
     header("Location: ../view/ReadReviews.php");
 } else {
     if ($_SESSION['action'] == "writeReview") {
         header("Location: ../view/WriteReviews.php");
     } else {
         if ($_SESSION['action'] == "displayReview") {
             $review = unserialize($_SESSION['review']);
             $listOfReviews = $reviewModel->getReview($review->getFlightDescription());
             $_SESSION['listOfReviews'] = serialize($listOfReviews);
             header("Location: ../view/ReadReviews.php");
         } else {
             if ($_SESSION['action'] == "insertReview") {
                 $review = unserialize($_SESSION['review']);
                 $insertToken = $reviewModel->insertReview($review);
                 if ($insertToken > 0) {
                     $arrayOfBookings = $bookingModel->getBookings($_SESSION['userId']);
                     $_SESSION['bookingsArray'] = serialize($arrayOfBookings);
                     header("Location: ../view/Startup.php");
                 } else {
                     session_destroy();
                     header("Location: ../view/Error.php");
                 }
             } else {
                 if ($_SESSION['action'] == "purchaseTicket") {
                     $result = $bookingModel->purchaseTicket();
                     if ($result > 0) {
                         header("Location: ../view/Confirmation.php");
                     } else {
                         session_destroy();