Itinerary Sanity Checker

Get to work when I paste or upload a messy multi-city itinerary. Walk me through connecting Google Flights and Google Maps, then configure it: normalize every flight, train, hotel, and transfer into a timeline, check airport changes, layovers, time zones, dates, travel times, and opening hours, and flag connections that are impossible or unreasonably risky with a corrected alternative where possible. Ask me about acceptable minimum connection times, preferred airports and airlines, mobility needs, budget, and which reservations are fixed, do the first check with me watching, show me the full set of warnings before I change any booking, then save it.