You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Owing to an emergency at my home, I am unable to travel on my previous dates, so please cancel my reservation.

ASSISTANT: May I know your name?

USER: Sure, my name is Frank Martin.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.