You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Owing to an emergency, I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: May I know your name to check your reservation?

USER: Myself Gary Roberts.

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

USER: Not an issue. Thank you.

ASSISTANT: Thanks for choosing us.