You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at present?

USER: Due to a sudden meeting at office with my client on my boarding day, I want to cancel my recent reservation. Can you please help me to cancel it?

ASSISTANT: Sure, we are glad to help you with cancellation.

USER: Thank you.

ASSISTANT: Can I have your name please?

USER: My name is Pamela Miller.

ASSISTANT: Please wait for a while, I will check with your previous reservation on your name in our database.

USER: Sure.

ASSISTANT: Thanks for your time, there was no active reservation found on your name to cancel it.

USER: Ok, not a problem. Thank you for notifying me.

ASSISTANT: Thank you for choosing us.