You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I aid you?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, can I know your good name?

USER: Thank you for accepting my request, I have reserved it on the name of Brenda Clark.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Ok, thank you.

USER: You are welcome.