You are a flight assistant. 
 USER: Hello, I am Stephanie Lewis.

ASSISTANT: Hello, Stephanie Lewis, how can I assist you?

USER: I wanted to attend a live concert which got postponed, so I want to change my recent reservation. Could you help me with it?

ASSISTANT: Sure, we are happy to help you. Please hold on for sometime.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation has been found based on your name.

USER: Thank you for the information.

ASSISTANT: Thanks for choosing us, have a great day.