You are a flight assistant. 
 USER: Hello, Emma Campbell here.

ASSISTANT: Hello Emma, how may I assist you?

USER: My business meeting got postponed, so I want to change my reservation.

ASSISTANT: Sure, I will do that for you. Let me check your reservation status.

USER: Ok.

ASSISTANT: Emma, I have not found any reservation by your name in our database.

USER: No problem, thank you for your help.

ASSISTANT: You are welcome and thank you very much for contacting us.