You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, may I know your name please?

USER: Myself Barbara Clark.

ASSISTANT: Ok, please Clark wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found. Thank you for choosing us.

USER: Ok, thank you for your information.