public String addFlightToCart(long bookingId) {

    List<Booking> flights = bookingFlowModelBean.getFlights();

    for (Booking flight : flights) {

      if (flight.getBookingId() == bookingId) {
        bookingFlowModelBean.getCartBookings().add(flight);

        break;
      }
    }

    return "cart";
  }
  public void removeBooking(long bookingId) {

    List<Booking> cartBookings = bookingFlowModelBean.getCartBookings();

    Booking bookingToRemove = null;

    for (Booking cartBooking : cartBookings) {

      if (cartBooking.getBookingId() == bookingId) {
        bookingToRemove = cartBooking;

        break;
      }
    }

    if (bookingToRemove != null) {
      cartBookings.remove(bookingToRemove);
    }
  }