Proof of concept for a YAML script for a Chat Bot

bot-script-example-hello.yml

0:
  messages:
    - Hello!
    - I'm a Bot!
  next: 1

1:
  messages:
    - "What's your name?"
  input:
    type: text
    key: user_name
    when:
      empty:
        messages:
          - "The name is empty!"
          - "Let's try again.."
        next: 1
      not-empty:
        next: 2
2:
  messages:
    - "Nice to meet you, ${user_name}"
  next: 3