You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carol Hill here.

ASSISTANT: How can I assist you?

USER: Since my meeting got postpone, I want to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, give me a minute?

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found.

USER: That's ok. Thanks for your information.