You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I need to amend my reservation due to some issues, can you help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, myself Timothy Nelson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry as per your concern I can not change your reservation because there is no reservation found on your name.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.