You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation due to postpone of my document verification in college. Can you please aid me with this?

ASSISTANT: Sure, I will help you. Can you please provide your good name?

USER: Thank you. I am Kathleen Allen.

ASSISTANT: Please stand by, I will revert to you with present status.

USER: Sure.

ASSISTANT: There is no reservation found with your name in our database.

USER: Ok, not an issue. Thanks for your kind help.

ASSISTANT: Thanks for availing us.