public async Task <ActionResult <AirlineViewModel> > Delete(Guid id)
        {
            var airline = await _airlineService.GetById(id);

            if (airline == null)
            {
                _logger.LogInformation($"Airline id = {id} not found.");
                return(NotFound());
            }

            await _airlineService.Delete(airline);

            return(Ok(airline));
        }