You are a flight assistant. 
 USER: Hello, I am Andrew Carter.

ASSISTANT: Hello. How exactly I can serve you the best today?

USER: As the meeting which I have scheduled to attend got postponed, I want to change my reservation. Can you please help me?

ASSISTANT: Sure, please standby.

USER: Ok.

ASSISTANT: Thanks for waiting. We checked the list but there was no reservation on your name to change.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you.