Attended chat bot: only suggest answers for operator to choose from?

No. Like this:

User: I want to book a double room, two nights, starting Saturday

Bot does not answer anything to user: instead, bot will display one or more answers to a human operator. The human operator will select an answer, maybe change (edit) a little, then send it to the user.

User: …bla bla bla

Exactly like the Ergo use case I mentioned.