AWS Alexa

Intent - Goal want to achieve (BookHotel), map in Skill Service (Lambda)
Invocation Name - Intent people Said
Sample utterance -  Invoke Intent (book)
Slot - parameter fulfill the intent {City} (New York)

From, Ask, About, Using > Keyword to trigger intent

Open, Talk, Play, Start > Session working with intent (exit, close to stop the session)

Skill Service - Utterances, Slot Types, Intent Schema (Amazon Developer) [Configuration]

Skill Interface - Lambda, HTTP Service