You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

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

USER: My name is Helen Jones.

ASSISTANT: Just give a moment.

USER: Ok, I will wait.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for opting us.