A Male Age 42 Yrs With H/O Cough ,Dry   3 Months ,Increaes In Office , No Sleep Disturbance, Non Smoker, No Acid Peptic Dz, No Upper Resp. Complain, Not On Medication For Htn, No Haemoptysis,  No Fever, No Wt Loss, No F/H/O  Asthmabut He Says His Sister Has Some Allergy-No Details, Onset History , He Says Started Whe There Was Dust In Weather With Urti, Then Persists.

Give Nebulisation With Salbutamol , He Felt No Imprvoment WHAT TO DO?