You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christopher Gonzalez.

ASSISTANT: How can I help you?

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you.