You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

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

ASSISTANT: Sure, I will help you. Can you please tell me your name?

USER: Patrick Young here.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: No problem, thank you for the information.

ASSISTANT: My pleasure, have a great day.