You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency, my FIFA tournament got postponed. So I want you to change my existing reservation.

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

USER: Sure, Paul Hill here.

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

USER: Ok, no issues.

ASSISTANT: Welcome, thank you for reaching us.

USER: Thank you for your information.