You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Mary Martin.

ASSISTANT: How can I aid you?

USER: Just before 2 hours I have done my reservation to New York but now I want to cancel my reservation for some emergency. Can you please help me?

ASSISTANT: Ok. Give me a minute.

USER: Sure.

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

USER: I think something went wrong in my reservation. It's ok. Any way, thank you for the information.

ASSISTANT: Ok. You are welcome.