You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, my live concert in New York got postponed, so please change my existing reservation.

ASSISTANT: Sure, can I know your name?

USER: Sure, Raymond Allen here.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on given name.

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

ASSISTANT: Thank you for reaching us.