Quit smoking?

I was smoking at a playground near my workplace.. An old lady came up to me.. Boy ah, you are very young.. Why you smoke?? I just smile.. She told me her family story and all.. I just listen as no harm listening so yah.. Should I quit smoking?? Is it a sign for me to stop smoking?? I don't know lah.. I'm on my way to work.. I open shop today... It's only 5.30 am and I'm already in the train.. Sigh..