Flying into BKK on one itin and connecting to an ANA flight later in the day. As it's a long layover (and I've things to do) I'll probably head into town since TG will interline my bags.

However, does anyone know what time the ANA portion of the transfer desk is staffed? I'd prefer not to linger in town longer than I need, but also don't really want to wait until 9 or 10PM to get a boarding pass and re-clear security.