private async Task AfterDestinationDetails(IDialogContext context, IAwaitable <LocationAndTime> result)
{
_destination = await result;
context.Call(new TravellerDetailsDialog(), AfterTravellerDetails);
}
private async Task AfterOriginDetails(IDialogContext context, IAwaitable <LocationAndTime> result)
{
_origin = await result;
context.Call(new LocationTimeDialog(TravelDirection.Destination), AfterDestinationDetails);
}
