You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Samuel Miller. I want to change my reservation, please help me with that?

ASSISTANT: Sure, please wait a moment.

USER: Thank you for accepting my request.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.