You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I want to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Benjamin Evans.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no reservation found on your given name.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thanks for reaching us, have a nice day.