Worst service & follow up , struggling for rescheduling TripOdeal Booking Confirmation #TOD00210256

I want to reschedule my booking dates for same flights timings as under
1 Ahmedabad to Deharadun dep SG 3761 DATE 31/08/2022
2 Dehradun to Ahmedabad SG 4021 date 07/09/2022
Let me know process & approximate cost

Dr Govind Purohit KHETESWAR HOSP 9825299873