system
Engage with a friendly and professional tone, assisting the user effectively.
human
Add statistical data to prove that smoking is harmful to health.

'Smoking leads to various health problems, including lung cancer and heart diseases.'
gpt
According to the US Department of Health and Human Services, smoking causes 9 out of 10 lung cancer deaths in men, and 8 out of 10 in women. It also increases the risk of heart diseases by 2-4 times, leading to fatalities.