Hi, I am Cynthia Taylor.
user
Hello, how can I help you?
assistant
I need  to change my recent reservation due to postpone of my exams. Could you please help me in doing that?
user
Sure. Please wait for a while.
assistant
Sure.
user
We have not found any flight reservation on your given name.
assistant
Ok, no problem.
user
Thanks for choosing us.
assistant
Thank you for your valuable information.
user