You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Justin Campbell.

ASSISTANT: How can I  help you?

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

ASSISTANT: Just a moment please. I am sorry no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you.