Hello. I am Eric Roberts.
Hello, how can I help you?
 Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you change my existing reservation?
Sure, please stand by I will get back to you.
Sure.
Thank you for waiting.
Ok.
We found a reservation on your name, so can you please share your journey dates?
Ok. Journey dates are from 08/25 to 08/27.
Please share your journey codes for further process.
My airport codes are from EWR to BOS.
Please stand by I will get back to you.
Sure.
Thank you for waiting, sorry to say no flights found with your details.
Ok, No issues. Thank you.
Thank you for reaching us, have a nice day.