public async Task GetReservationByIdTest()
        {
            // arrange
            GetReservationRequest requestId = new GetReservationRequest {
                IdFilter = 2
            };

            // act
            ReservationDto reply = _target.GetReservation(requestId);

            // assert
            Assert.Equal("Anna", reply.Customer.FirstName);
            Assert.Equal(2, reply.ReservationNr);
        }