You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: My name is Betty Nelson. I would like to change an existing reservation.

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Sure, take your time.

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

USER: No issue, thank you for the information.

ASSISTANT: Thank you for reaching us.