Ok so I will be taking my return flight from ISB to DTW in month or so and I have a short layover in AUH. I want to spend a week in AUH with my family so I need to know if its possible to leave ISB a week earlier to AUH and then continue my flight as it originally was from Abu Dhabi while skipping out in the ISB-AUH flight? Please let me know if its possible. My travel agent said changing the ticket would cost $300 and a flight to AUH from ISB is only $100!!