Hello.
user
Hello, how may I assist you  for the day?
assistant
I am Matthew Parker. Owing to an emergency, I want to change an existing reservation. So please help me in changing the reservation.
user
Sure, we are here to help you. Can you please wait for a while.
assistant
Sure.
user
We  found a reservation, please forward your new reservation details.
assistant
My source is Philadelphia, PA - PHL and destination code is IL - ORD. I want to fly on 02/28 and return on 03/01.
user
Thanks for sharing your details, please hold on for a moment.
assistant
Sure.
user
Sorry we did not find any flights matching your new reservation details.
assistant
Not an issue. Thank you.
user
Thank you for reaching us. Have a good day.
assistant