You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Due to heavy rains cricket match got postponed, so I need to change my existing reservation.

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Margaret Thompson here.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.