You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please change my existing reservation which I have done previously with my name Edward Moore.

ASSISTANT: Sure, let me check our website. Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Moore, no reservation is available on your name.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for contacting us, have a nice day.