You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to cancel my recent reservation as my meeting is postponed to other place. Can you please help me our with that?

ASSISTANT: Sure, I am very happy to help you with that. May I know your good name please.

USER: Sure, Raymond Thompson here.

ASSISTANT: Sorry to inform this, no reservation is found on your name in our database.

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

ASSISTANT: Thank you for opting us.