You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, may I know your name for the changing process?

USER: Yes, my name is Amy Nelson.

ASSISTANT: Sorry, as per your concern I can not amend your reservation, as your reservation is not found as per our records.

USER:   That's ok, thank you for the response.

ASSISTANT: Welcome, thank you for reaching us.