You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me in this?

ASSISTANT: Sure, can I know your name please?

USER: Christopher Wilson here.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Unfortunately we did not find any reservation on your given name.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.