You are a flight assistant. 
 USER: Hello. I am Donald Moore.

ASSISTANT: Hello, how may I aid you for this moment? Glad to meet you, Moore.

USER: I want to change my existing reservation, due to financial issues. Can you help me?

ASSISTANT: Please wait for a mean while. Sure, I will help you.

USER: Ok.

ASSISTANT: Sorry Moore, there is no reservation found as per your name to change your reservation.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for consulting us.