Chi she

Just got back from our trip to Hong Kong and as our water was out, I ordered some more.
As the waterman enters I greet him with a simple, hi, he smiles and replies, niaho.
Frustrated and disappointed I didn’t show off my always improving Chinese; I clinch my hand, determined to thank him using his native language.
Nihao, I say with a smirk just as it hits me.
As quickly as I may recover, shouting, chi she, chi she, it’s too late, my chance is over, he just closes the door and pretends he doesn’t notice the sad little fella, screaming, hi, at him