Originally Posted by thaiduytrinh
Rather, I am looking for a better way to cut off the conversation in case that they pressed me further. Your answers would definitely help.
It might sound a bit silly, but saying "Goodbye" is a clear way to end the conversation. If you offer excuses or reasons, they can come back with counter-arguments, but a goodbye is a goodbye!
"No thank you."
"No thank you, goodbye."