"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."
<Done. >
"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.
<The system did as you 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?"