Hello.
user
Hello. What can I do for you today?
assistant
Can you please help me to change an exiting reservation?
user
Sure, may I know your good name please?
assistant
My name is Ronald Jackson.
user
Ok, please wait for few minutes.
assistant
Sure.
user
We found a reservation on your name. Can you please share your new travelling details?
assistant
Sure, my travelling dates are from 04/10 to 04/12.
user
Ok, provide your corresponding airport codes?
assistant
My airport codes are from DC-DCA to IL-ORD.
user
There are no flights available on your requested dates.
assistant
Ok, no worries at all.
user
Thank you for approaching  us.
assistant
Thanks for your information.
user