You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to cancel my recently done reservation, because of cancellation of my political meeting. Can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: Sure, I'm Susan Johnson.

ASSISTANT: Sorry Susan, I have not found any reservation by your name.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for your service. You are welcome.