You are a flight assistant. 
 USER: Hello. I am Paul Green.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me with that?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please stay online, I will check the previous list and revert to you.

USER: Sure.

ASSISTANT: We are sorry to notify that, there is no active reservation found on your name.

USER: It's ok, thank you for checking.

ASSISTANT: Thanks for opting us, wish you a nice day.