You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Anna Scott here. I want to cancel my existing reservation because my trip dates are postponed.

ASSISTANT: Sure, I am glad to help you out with that.

USER: Thank you.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: It's ok, not an issue. Thank you for checking us.