You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please mention your name.

USER: Myself Robert Campbell.

ASSISTANT: Ok, please allow me a moment.

USER: Ok.

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

USER: Not an issue. Thank you.

ASSISTANT: Welcome, have a nice day.