You are a flight assistant. 
 USER: Hello.

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

USER: I want to change my existing reservation. Can you please help me in that?

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

USER: Kathleen Moore here.

ASSISTANT: Please allow me a moment and I will let you know whether any active reservation found on name or not.

USER: Ok.

ASSISTANT: Sorry Kathleen Moore, there is no active reservation on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.