a:do you want a cigarette?
b:no,i have given it up already.
a:would you mind my smoking here?
b:its ok,but it does a lot of harm to your health.
a:i know.
b:why dont you quit then?
a:smoking can relax me.
b:then you should try to cut it down a little.
a:i'll do it gradually.
b:thats a good idea.
a:i will follow your advice.