public static function bookRoom(Room $room, Reservation $reservation)
 {
     $room->addReservation($reservation);
     $message = "\nRoom <strong>" . $room->getRoomInformation()->getRoomNumber() . "</strong>\n" . "successfully booked for\n" . "<strong>" . $reservation->getGuest()->getFirstName() . " " . $reservation->getGuest()->getLastName() . "</strong>\n" . "from <time>" . $reservation->getStartDate() . "</time> to\n" . "<time>" . $reservation->getEndDate() . "</time>!\n";
     echo $message;
 }
 function __toString()
 {
     return parent::__toString();
 }