Hello, I am Sarah Walker.
user
Hello, how may I best serve you today?
assistant
I need to change my recent reservation due to postpone of exams.
user
Sure, please wait for a moment.
assistant
Could you please help me in doing that? Ok.
user
We could not find any reservation on your name.
assistant
No problem, thank you for your information.
user
Thank you for opting us.
assistant