<human>: I was at a KFC in Shenzhen, China last night, in which it seemed like everything I wanted was out of order. So finally I picked something that they still had, but after I paid, the cashier told me it would take 20 mins for them to fetch it from the "warehouse" and cook it. So I canceled my order and got something they had already cooked but it was more expensive. So instead of charging me the extra difference, the cashier decided to just let it slide. However, then a manager walked by and realized what just happened and said this was coming out of her(cashier) own pocket. Then this is where I stepped in and bluffed saying how I knew the general manager for KFC in China, and he would consider this to be good business practice. After I said that, he looked at me for a couple secs and just walked away.

Summarize the given text in a few sentences.
<bot>: Bluffed a KFC manager that i knew his big boss into pressuring him to be a better manager to his employees and customers