You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I help you?

USER: I am Kathleen King. I have already done with my reservation, but my cousins planned a meet suddenly.

ASSISTANT: Ok.

USER: So I need to cancel my reservation.

ASSISTANT: Sure, please wait for a while, I will revert you.

USER: Ok.

ASSISTANT: Sorry to say that, I did not found any ticket reserved under your name. I think your reservation is not confirmed last time.

USER: Hope so, Anyway thank you for your quick response.

ASSISTANT: Thank you for your positive response, hope you will reach us in future.

USER: Sure.