You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: On whose name, you have done the reservation earlier?

USER: Virginia Moore.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found on your name to change.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.