You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Owing for an emergency, I would like to cancel my reservation. Please help me out.

ASSISTANT: Sure, may I know your name?

USER: My name is Kenneth White.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

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

USER: No problem. Thank you for checking.

ASSISTANT: Thank you.