public async void GetApplicationAnswerSaludarTest()
        {
            luisClient.GetUserIntent(Arg.Any <string>())
            .Returns(x => Task.FromResult(new IntentionResult {
                Intention = Intention.Saludar, Telefono = null
            }));

            var result = await conversationService.GetApplicationAnswer("hola");

            Assert.AreEqual(Message.HelloMessage, result);
        }