Originally Posted by
Xandrios
If I'm not mistaken it may also be possible to split the reservation into two. After that point you can then cancel one.
In any case I'd call to make sure only one, and the right one, is cancelled. I'd expect the agent to be able to do that.
This has been my experience too, I wanted to change the return ticket for one person, they had to split the ticket into different reservations (each passenger their own PNR).