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, may I know your name for the changing process?

USER: Sure, myself Sharon Roberts.

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, not an issue. Thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.