You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my reservation due to postponed of my Arts competition to other dates, so please help me.

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: Thank you. Sure, I am Emily Anderson from Chicago.

ASSISTANT: Thanks for providing your name. Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: No issues, thank you for your effort.

ASSISTANT: Thank you for choosing us.