<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Can you tell me about the technology that powers the features of Amazon Alexa?
<|assistant|>
Amazon Alexa is powered by the technology from Amazon's Alexa Voice Service (AVS). AVS provides an interactive voice-controlled software service that powers devices such as Amazon Echo. It uses audio-based recognition technology to detect spoken commands, then processes the data and responds back out loud. Alexa uses speech recognition, natural language understanding, and adaptive speech algorithms to process the data. These algorithms can detect even subtle differences in word pronunciation, and can respond accurately even when there are multiple people speaking or when noise is present. Alexa also continuously refreshes its understanding of user's preferences as it adapts to its environment and new situations.