I know you are joking, but I agree - there should be a disclosure. There was one with Cathay Pacific; but there wasn't with Finnair, so I didn't immediately know I was dealing with an AI bot.
But, to be a proper AI tag like we'd build it, we need fifteen different parts of the disclosure, a percentage-based system, and a twelve-month Github discussion on each part, all the while not actually talking to anyone from an airline.