from web site
Booking an airplane ticket is a task often performed under pressure, and even the most vigilant persons can mistakenly provide the wrong details about the passengers. The tiny typo or the mismatch of names, although they might look insignificant, nevertheless, can create huge problems at the very stage of check-in or boarding.
link:-https://castocus.com/blogs/44811/Air-Canada-Name-Change-Policy-for-Domestic-International-Flights