You can start the Air Canada manage booking within 24 hours of the flight schedule when you realize something is wrong with your ticket. However, in order to manage your booking, you must be aware of the policy, terms, and restrictions. For bookings made directly with Air Canada (including aircanada.com, the Air Canada app, and our contact centres), or with Flights Assistance, Google Flights, and Skyscanner.
Web Address: https://flightsassistance.com/air-canada-manage-booking/