You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am looking to cancel the ticket which is reserved in the last week because the planned trip got cancelled. Can you please help me with that?

ASSISTANT: Sure, I will help you with the cancellation of flight reservation. Please wait.

USER: Thank you for considering my request.

ASSISTANT: May I know your name please?

USER: My name is Christopher Young.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: It's ok, not an issue. Anyways thank you for your valuable time.

ASSISTANT: Thank you.

USER: You are most welcome.