To manage your Air New Zealand booking, log into the website or mobile app using your booking reference and last name. You can then view your itinerary, choose seats, purchase extras like additional baggage allowance or meals, update your contact details, change or cancel flights, and access your mobile boarding pass. For more details about Air New Zealand Manage Booking contact the live person at 1 (800) 262-1234 or 1 (888) 838-0309 (OTA-Skip Waiting). Or visit the Airways Manage Booking site.