You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Carolyn Young.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.