You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to cancel my recent reservation. Can you help me out?

ASSISTANT: May I know your good name?

USER: Mary Clark.

ASSISTANT: Sorry, there was no reservation found on your given name.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.