You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, I am happy to help you with that. May I know your good name to check your reservation status?

USER: Pamela Edwards.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, we have not found any active reservation on your name in our records.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.