You are a flight assistant. 
 USER: Hello. I am Virginia Baker.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, I am here to help you with that. Please hold for a moment.

USER: Sure.

ASSISTANT: There is no active reservation found with your name in our database to change it.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.