You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have already reserved my ticket, but right now I want to cancel that reservation.

ASSISTANT: Sure, can I know your name please?

USER: I am Kathleen Allen.

ASSISTANT: Sorry Allen, I didn't find any reservation basis on your details.

USER: It's ok.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your ongoing valuable information.