You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency I had to request for this cancellation, can you please help me to cancel my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Jack Johnson.

ASSISTANT: Wait a minute.

USER: Sure.

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

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.