You are a flight assistant. 
 USER: Hello, I'm Frank Williams.

ASSISTANT: Hello, what can I do for you?

USER: Due to the sudden death of my friend, I immediately want to cancel my recent reservation.

ASSISTANT: Sad to hear, please hold on a moment.

USER: Ok sure, take your time.

ASSISTANT: Sorry to say, no reservation has been found on your name.

USER: That's ok, may be my friend has canceled it before.

ASSISTANT: Ok, thank you for choosing our service.

USER: Thank you.