You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need to cancel my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, I will help you to cancel your reservation. Please share me your name.

USER: Thank you for considering my request. myself Nicholas Miller.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Welcome, have a nice day.

USER: Thank you for your service.