You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to cancel my reservation as my exams cancelled, can you please help me out with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name to proceed for cancelling your ticket?

USER: Sure, myself Karen Johnson.

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

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Welcome, thank you for reaching us.