@latikvng "ok" is a good one because it shows disinterest while at the same time its expewssing to the person that youre so unaffected by their statement that you care too little to offer more of a reply
@sojurukoji toilet paper roll with dryer sheets tied to one end as a filter , try it out
it wont get rid of the smoke emitting from the cigarette itself but itll help when blowing it out