You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry, according to my records the reservation is not found on your name. May I know your name please.

USER: Sure, my name is Katherine Nelson. Ok, that's fine. Anyways, thank you for your service.

ASSISTANT: Thank you.