You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you with that.

USER: Thanks for that.

ASSISTANT: Can I know your name to check your previous reservation?

USER: I am Catherine Davis.

ASSISTANT: Ok, please be on hold to check.

USER: Ok, I will wait.

ASSISTANT: We regret that, there is no reservation on your name in our records.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us, have a great day.