You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Catherine Martin.

ASSISTANT: Nice meeting you Martin.

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

ASSISTANT: Sure, I am oblige to help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok, take your time.

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

USER: That's ok, thank you for your information.

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