You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brian Wright.

ASSISTANT: How can I aid you?

USER: I want to cancel my reservation, due to some issue.

ASSISTANT: Sure, I will help you in cancelling.

USER: Thank you.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.