You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I am Ronald Carter here.

ASSISTANT: Ronald, which service are you seeking for today?

USER: My business meeting got postponed so I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, we can help you. Just wait a moment, I will check the status and let you know.

USER: Sure.

ASSISTANT: Unfortunately there is no reservation found in our database on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.