You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, may I know your good name please?

USER: My name is Helen Martinez.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.