Coordinating Different Passenger Lists for an O'Hare Round Trip: Before the Journey: When a Return Address Changes

https://blogfreely.net/lainehlrr/h1-b-arranging-an-ohare-ride-when-the-booker-will-not-be-traveling-before

Use the actual later departure address when the return plan moves. Before confirming, read each journey independently. It should identify its people, belongings, date, flight, addresses, and contact arrangement without needing the other leg to explain it