public async Task <HttpResponseMessage> CancelBooking(int appointmentID)
        {
            var message = CreateMessageData($"booking/{appointmentID}", new KeyValuePair <string, string>("appointmentID", appointmentID.ToString()));

            if (appointmentID <= 0)
            {
                return(CreateValidationErrorResponse(message, new ValidationResult(Validation.InvalidParameters)));
            }

            var result = await _appointmentService.CancelBooking(appointmentID);

            if (!result.IsSuccess)
            {
                return(CreateValidationErrorResponse(message, new ValidationResult(result.message)));
            }

            return(CreateOkResponse(message, appointmentID));
        }