You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best assist you?

USER: I would like to change my reservation as my meeting got postponed, please help me with it.

ASSISTANT: Sure, I will help you in that. May I know your good name?

USER: I am Pamela Hill.

ASSISTANT: Thanks for providing your name. Please for a while.

USER: Ok.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Thanks for the information.

ASSISTANT: Thanks for choosing us,. Have a great day.