You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

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

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Karen Lewis.

ASSISTANT: Ok, wait for a minute.

USER: Ok, take your time.

ASSISTANT: We are regret to inform you that, there is no reservation found on your name in our database.

USER: That. That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.