You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to cancel my recent reservation?

ASSISTANT: Sure, I am here to help you with cancellation.

USER: Thank you.

ASSISTANT: Can I have your name please?

USER: John Johnson here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there was no reservation found on your name to cancel it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.