AI assistants are moving from suggesting trips to taking actions. An assistant may be able to compare hotels, fill in booking details, reserve an activity, or purchase a small travel service. That sounds like the natural next step after itinerary planning: fewer tabs, less repetition, and less time spent entering the same information.
But there is a large difference between asking AI to find three hotels and allowing it to buy one.
Most people begin with a spending limit: do not spend more than $300 a night, or ask before any purchase over $100. That is useful, but it only controls one part of the decision. An AI agent could stay under budget and still choose a nonrefundable rate, share information with a service you would not trust, book an inconvenient location, or accept terms that create a costly problem later.
Before an AI assistant can make or prepare travel purchases for you, it needs something closer to a travel purchase policy. The policy should define what it may do, which suppliers it may use, what information it may share, and when it must stop for your approval.