Amazon Lex

Overview

• Managed service for building conversational interfaces (bots)
• Same engine as Alexa
• Recognizes voice/text
• Uses Amazon Polly for text-to-speech
• Use cases
  • Informational bot
  • Application/Transactional bot (e.g. ordering pizza)
  • Enterprise Productivity bot  - connect to custom data sources
  • Device control bot
• Integrated with Messaging platforms
  • e.g. Slack, Skype, Messenger

Model

• Intent - actions to be fulfilled by the bot (e.g. book a hotel)
  • Sample utterances
    • Phrases that invoke intents
      • Text or voice
    • Do not need to be exact
    • Example
      • "Can I make a reservation?"
  • Slots
    • Input data to fulfill the intent
  • Prompts
    • Way to elicit answer for the slot
    • Example ("time")
      • "What time do you want to go to cinema?
  • Fulfillment
    • Call to Lambda