public async Task ProcessAsync(Booking booking)
        {
            string content;
            using (var client = new HttpClient())
            {
                var result = await client.GetAsync("http://www.readify.net");

                content = await result.Content.ReadAsStringAsync();
            }

            // Todo: Do things with content!
        }
        public decimal Compute(Booking booking)
        {
            var result = booking.Cost.Amount * 2;

            return result;
        }