You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you please change my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: My name is Michael Carter.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for opting us.