Note that Siri is a self-learning, machine algorithm. This means that at first it will probably work very poorly. You may even think that Siri is mocking your pronunciation. Don’t worry; eventually it will learn to understand you better.
Important: In order to set up the integration with Siri, go to Settings -> General Settings -> Siri in Chaos Control and click the "Setup Siri" button. After that, you will need to wait for 15-20 minutes, and then you can start training Siri to add tasks to Chaos Control.