............and they came back with "good morning."
ATC-talk is really only totally procedural when they're busy, rest of the time they're as human as anyone else, and I think on the Graveyard shift ( Ooops, no pun intended ! ) over N.E. Malaysia / S.E. Vietnam is as borin' as anywhere.
Once finished an ATC position report - in English of course - over the USSR with "Do Svadanya". Guy came back with a torrent of Russian ! Bored out of his mind, just wanted someone to talk to !