public AddFriendResponse AddFriend(string friendID)
 {
     AddFriendResponse response = new AddFriendResponse();
     RelationshipService relationshipSvc = new RelationshipService(_repository);
     try
     {
         relationshipSvc.ModifyFriendsList(RelationshipService.Operation.AddFriend, _currentTravelerId, new Guid(friendID));
         response.MarkSuccess();
     }
     catch (Exception ex)
     {
         ReportError(ex, response);
     }
     return response;
 }