vm.deleteTrip = function (trip) {
            vm.isBusy = true;
            vm.errorMessage = "";
            var tripToDelete = trip;

            $http.delete("/api/trips")
                .then(function (response) {
                    //if succeed
                    vm.trips.splice(tripToDelete, 1);
                }, function () {
                    //if failed
                    vm.errorMessage = "Failed to delete Trip";
                })
                .finally(function () {
                    vm.isBusy = false;
                });
        };