You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I have booked a flight ticket previously. I am willing to cancel my ticket due to some virus is spreading in the place where I planned to visit. Can you aid me in cancelling my ticket?

ASSISTANT: Sure, could you please help me with your name for cancelling your ticket?

USER: Myself Katherine Clark.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry Clark, there is no reservation found on your name to cancel your reservation.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: You are welcome always.