You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I want to cancel my reservation, can you help me with that?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Mark Smith here.

ASSISTANT: Ok, please allow me a few minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to cancel.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.