You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation status on your name.

USER: I am Benjamin Edwards.

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry Benjamin Edwards, there is no active reservation on your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.