You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of service your looking for?

USER: Owing to an emergency I want to change my existing reservation.

ASSISTANT: Sure, please share me your good name.

USER: Myself Mark Robinson.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for availing us.