ສະບາຍດີ
sound like... sabadi (I guess, I am not good at trying to type out anything from Lao language, ask me to say thank you or hi and I can, ask me to type it and I stare at my screen trying to figure out 'how DO you spell it?')
Means hello.
I had to google that spelling, I can't write Lao for shit, can't type Lao for less shit. Also I was much better when I was a kid (but not by much), and I probably have a heavy accent because even though it was native language I was not taught much of it all, so it's very likely that I don't pronounce it right anyway <.<