Moderator, Iberia Airlines, Airport Lounges, and Ambassador, British Airways Executive Club
Join Date: Feb 2010
Programs: BA Lifetime Gold; Flying Blue Life Platinum; LH Sen.; Hilton Diamond; Kemal Kebabs Prized Customer
Posts: 64,092
In essence just have one of the other travellers round with the phone on speakerphone (though not in a BA lounge....). It seems a reasonable thing to do rather than taking it on trust that you can alter somebody's booking without their consent.