You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please let me know your name.

USER: I am Larry Hill.

ASSISTANT: There is no reservation active with your name.

USER: Ok, not a problem at all. Thanks for your information.

ASSISTANT: Have a good day.