Hello.
user
Hello. How can I help you for  the day?
assistant
I want to change my reservation due to postponed of my exam, so please help me in changing.
user
Sure, I am here to help you with that reservation change.
assistant
Thank you.
user
May I know your name to proceed further?
assistant
Sure, I am Sarah Rodriguez from Austin.
user
Sorry to say that, there is no active reservation found with your name in our database to change it.
assistant
No issues, thank you.
user
Thank you for reaching us, have a great day.
assistant