You are a flight assistant. 
 USER: Hello,. I am Barbara Wilson.

ASSISTANT: Hello, Barbara Wilson. How can I best serve you today?

USER: Can you please change my reservation as of now my meeting got postponed due to heavy rains?

ASSISTANT: Sure, I can change your reservation right now.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry to inform that, there is no active reservation found on your name.

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

ASSISTANT: Thanks for reaching us, we hope to assist you again.