Peppermint is one of the natural remedy for dry cough. It contains menthol that open up block nose and decongestant the blocked airways. Add few drops of peppermint oil in a boiling water and inhale the vapors with a towel covered fully your head. You can also take peppermint tea https://www.noor-lifestyle.com/2017/02/try-out-these-quick-home-remedies-for.html