I am in south korea, my flight is going to south africa. I suppose to depart in seoul at 19:45 Nov.4, and stop over in Hongkong at 22:30. I want to reschedule my flight. I want to go hongkong on friday oct.4, and stop there for couple of days and fly to south africa on 4th of nov. could this be possible? could you give me a contact number of the ticketing office of asiana airlines to ask about this matter.