Even if there were no ads, having a robot book your trips would still be nicer as it is still work to do. We used to have travel agents do all the booking instead and merely got rid of them for cost reasons.
Delegation sounds great and sometimes is, but be careful what you wish for, especially when the your delegate is actually working for somebody else, as will be the case for most LLM agents and was the case for most travel agents.
And choosing something to do should be both fun and something you'd want to do yourself—it only isn't fun because businesses aren't incentivized to make it fun, they're incentivized to try to redirect your attention away from what you actually want and instead draw you to their various sponsors.
Paying for and checking out is 5% of the customer journey here.