Upvote:1
A booking reference is not the same as a ticket. It's common for agents (either at a travel agency or at an airline) to create a booking and send email with the booking details (including the reference number) to the person arranging the booking in order to verify that everything is correct before purchasing the ticket.
One a booking has been ticketed, most airlines or agents will send email with the booking, including the ticket number, to the person arranging the booking.
If you and your son are the two passengers in the booking, then once ticketed you should see two (or more) ticket numbers in email or in the booking when viewed online.