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

ASSISTANT: Hello, how may I help you?

USER: My family meeting got postponed. I need to change my existing reservation.Can me help me please?

ASSISTANT: Ok, wait a while I will revert you.

USER: Sure.

ASSISTANT: Brain, no reservation found with your name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you Brain, have a nice day.