You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to cancel my reservation due to heavy floods at my destination place, so please help me to cancel.

ASSISTANT: Sure, May I know your name?

USER: Sure, my name is Mary Jackson.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.