private List<Car> getAvailableCars(String carType, Date start, Date end) {
		List<Car> availableCars = new LinkedList<Car>();
		for (Car car : cars) {
			if (car.getType().getName().equals(carType) && car.isAvailable(start, end)) {
				availableCars.add(car);
			}
		}
		return availableCars;
	}