You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Moore.

ASSISTANT: How may I assist you?

USER: I need to change my reservation as meeting got postponed, can you please help me out?

ASSISTANT: Sure, I am gleeful to help you. Sorry, there are no reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.