You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Ronald Parker. I want to cancel my recent reservation because my brother marriage was postponed, can you help me?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing us.