Amazon Lex is a service for building conversational interfaces into any application using voice and text. With Amazon Lex, you can quickly and easily build conversational bots (chatbots), virtual agents, and interactive voice response (IVR) systems. By leveraging foundation models (FMs) to enhance its natural language understanding capabilities, Lex can now resolve slot values in user utterances with greater accuracy. The Assisted Slot Resolution feature uses the advanced reasoning capabilities of FMs to improve accuracy and ultimately a better customer experience.
Source:: Amazon AWS