Hello,.
user
Hello, how can I help you?
assistant
Can you please help me in changing my existing reservation, as  my exam got postponed.
user
Sure, May I know your name?
assistant
Sure, my name is Joshua Robinson.
user
Ok, please wait.
assistant
Ok.
user
Thanks for waiting, we found reservation on your name, please provide your travelling dates.
assistant
Sure, my new trip dates are Mar 02-04.
user
Can I know your airport codes?
assistant
My airport codes are OAK to DTW.
user
Do you have any preferences?
assistant
I need a connecting flight.
user
Sorry, There are no flights found on your data.
assistant
Ok, no issues. Thank you for your help.
user
Thank you.
assistant