You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

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

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Sure, Kathleen Jackson here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your assistance.