Is Alexa AI or machine learning?

Machine learning is an application of artificial intelligence in which data is made available to machines so they can learn from it as opposed to having to be trained by humans to think and act in certain ways regarding the data. Every time Alexa or Siri responds incorrectly to your request, they learn from the error and utilize that information to react more accurately the next time. If a mistake was made, it uses that information to make improvements. The system also records if the reaction was favorable. The microphone on the device you are using records your request when you speak to Alexa or Siri.