You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Ryan Carter.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately we did not find any reservation on your given name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you.