Originally Posted by corporate-wage-slave

You should invite your contact to find an agent wearing a blue name badge since they have full ticketing skills. However other agents can also do it too, so long as there is an hour to go before the new flight. It cab be done in zone E or A landside, or at Customer Service desks in Flight Connections. It's marginally easier if they haven't checked in for the original flight. If not, it can still be done at Customer Services in Galleries South.