"How many rooms would you like?" a robot spoke to Ning.
"A single one," Ning replied.
"Please choose the size and facilities," the robot said as the screen showed a list of rooms with different facilities.
Ning chose one that had quite a bit of facility, but when he did, he realized that he didn't have enough credits.
"This must be a luxurious hotel if a single room for a night costs 500 credits," Ning said. "I'm short 300 credits. System, add 5000 credits to the account."
"Great," Ning said and pressed buy.
"Not enough credits," the robot spoke and the screen flashed red. Ning's eyes narrowed a little in confusion.
"Huh? I just put 5000. System, did you fail?" Ning asked.
"Then why does it say I failed? Did it not update?" Ning checked the screen to see how many credits he had and to his surprise, he only had about 300 credits. "Wait, I… what's going on?"