Hi.
Hello. How may I help you at this moment?
I want to change an existing reservation due to sudden change in my trip Can you help me?
Sure, I am here to help you with that.
Thank you.
May I know your name?
Eric Robinson.
I have found the reservation, may I know your airport codes?
Sure, IAD and PHL are my airport codes.
Can I know your travelling dates?
02/13 and 02/15 are my travelling dates.
Ok, do you have any other requirements?
I need  a connecting flight.
Ok, wait for a minute.
Ok.
Sorry to say that, there are no flight's available based on your travelling dates.
No issue. Thank you.
Thank you for reaching us.