Life behind the counter

My friend Anil introduced his pal B, whom I found enterprising. So off I went with my questions. He had had a stint with a famous retail giant in Dubai, where customers came from different countries, and he manned the cash counters.
“Tell me some interesting experiences,” I asked him.
He felt Europeans and Americans were friendly. A majority of Asians are cheerful and warm but there have been some unpleasant incidents, he said.
“What, what? Temme?” my journalistic instinct of negativity was at work.
“A lady who speaks my language bought some items and tried to pay through credit card. But it was in her hubby’s name and did not have the mandatory subsidiary benefits. When I told her we can’t accept it, she blew a fuse, yelled at me and lodged a complaint. The company knew I was not wrong, but customer is the king. After heated arguments, she left, but the story did not end there. The next day, her husband arrived and used abusive language.”
Any pleasant experiences?
“An Arab lady had left behind a pouch with $5000. I promptly delivered it to the manager. She returned in an hour and was too pleased. She offered me $100. When I said I cannot accept anything from customers, she promptly went to the counter, bought a gift coupon, thrust it on my hand and disappeared.”
Any funny incident?
“Many, there was this particular customer who kept blabbering and asked stupid questions like you do,” he laughed.