Just to add my bit here, I like to think I always thank the lounge staff and others like the GCC staff.
The one GCC that I have to check myself is HH. It's almost a game now, and I truly have to bite my tongue it stop a laugh when it happens. HH must have drilled their GCC staff to always reply to a given thank-you, with "You're welcome". I seem to have a habit (good or bad) of acknowledging something by saying thank-you. So a conversation with HH often runs like this....
HH - Good morning, how may I help you?
SI - Good morning, I'd like to check availability in XYZ
HH - Hold on a minute sir, and I'll bring it up
SI - Thank you
HH - Oh, you're welcome, you did say 2 guests, is that right
SI - Yes thanks
HH - Ok good....Oh you're welcome, was that for the two nights
SI - Yes it is thanks
HH - Oh you're welcome, I've just booked the king guest for you is that OK
SI - yes that's fine thank you
HH - You're welcome, will there be anything else today?
SI - No that's it for today thank you.
HH - Oh you're welcome!
Try it next time, it's an absolute laugh..........