Hello.
user
Hello, how can I help you today?
assistant
I would like to change my existing reservation, due to examination schedule postponed. Can you please help me?
user
Sure, may I know your good name?
assistant
My name is Karen Smith.
user
Please wait for a moment.
assistant
Sure, take your own time.
user
Sorry to say that, no reservation was found with your good name.
assistant
No problem, thank you for checking.
user
Thank you for reaching us.
assistant