You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: My business meeting got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure, may i know your name?

USER: I am Mark Phillips.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you so much.