public function isBookingStillAvailable()
 {
     $searchEngine = new SearchEngine($this->searchCriteria);
     $availableRooms = $searchEngine->runSearchForRoom($this->room->id);
     if ($availableRooms == null) {
         $this->errors = $searchEngine->errors;
         return false;
     }
     $roomCount = sizeof($availableRooms);
     return $roomCount > 0;
 }