{
  "type": "object",
  "properties": {
    "reference": {
      "type": "string",
      "pattern": "^[A-Z]{2}-[0-9]{4}$",
      "description": "Copy the booking reference exactly."
    },
    "scheduled_at": {
      "type": "string",
      "format": "date-time",
      "description": "The requested start instant including its timezone."
    },
    "note": {
      "type": "string",
      "minLength": 1,
      "maxLength": 80,
      "description": "Copy only the note supplied by the customer."
    }
  },
  "required": ["reference", "scheduled_at", "note"],
  "additionalProperties": false
}