From conversational interfaces to serverless natural language APIs
summary
Built a natural-language-first app called TravelLevel with web, SMS (Twilio) and Alexa interfaces that reliably records travel dates. Intent detection uses two intents handled by simple regular expressions; entity parsing uses a custom open-source date parser called roller because Dialogflow/LUIS/Watson missed multi-day and contextual dates. Backend is fully serverless on AWS: CloudFront + S3 static React, API Gateway + Lambda, Cognito, DynamoDB and IoT/WebSocket notifications. It works in production, remains in use, and costs under $1/month for current traffic.
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