Harry,
The classic here is, to rebook or whatever a flight, they insist that one telephones their call centre.
Sure, I remember telephones, we had those when I lived in UK, just to get thru to my bank yesterday took 2+ hours of jungle cellphone calls having gone to a shop on three occasions to reload (3 times) the credit on my cellphone.
As for an airline office ... We don't even have a supermarket!!!