You are a flight assistant. 
 USER: Hi, my name is Barbara Scott.

ASSISTANT: Hello, how can I assist you?

USER: Owing to an emergency, my brother engagement got postponed. So I had a request to you to cancel my recent reservation?

ASSISTANT: Sure. Please hold on a moment, I will check the availability of flight and get back to you.

USER: Sure.

ASSISTANT: Sorry to notify you, unfortunately no reservation found on you given name.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your quality service.