You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you?

USER: Due to emergency I need to cancel my recent reservation, can you please help me that?

ASSISTANT: Sure, May I know your name?

USER: My name is Helen Young.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you, Have a nice day.