You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Could you help me with changing an existing reservation?

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

USER: My name is Virginia Moore.

ASSISTANT: Sorry Virginia Moore, there are no flights reserved on your given name formerly.

USER: No issue, thank you very much for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.