You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Ok, there is no flight ticket been available on your name to change. Sorry for the inconveniences.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing our agency.