You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me out in changing my reservation as my meeting got postponed?

ASSISTANT: Sure, I will help you with the changing.

USER: Thank you.

ASSISTANT: May I know your good name to check in the reservation list?

USER: My name is Sharon Green.

ASSISTANT: Sorry, unfortunately there is no active reservation on your name.

USER:       That's ok, thank you for the response.

ASSISTANT: Thank you for availing us.