You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Mary Brown. I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please wait a moment, I will check the reservation list.

USER: Sure.

ASSISTANT: Sorry there is no reservation on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.