You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thanks for that.

ASSISTANT: Can I have your good name please to check your reservation status?

USER: My name is Jerry Brown.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Jerry Brown, no reservation has found under your name to change.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us, have  a good day.