You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency, my live concert got cancelled, so I want you to cancel my existing reservation.

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

USER: Sure, Barbara Miller here.

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

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Welcome, thank you for reaching us.