You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you now?

USER: I am Jonathan Wilson. Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

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

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Jonathan Wilson, no reservation has found under your name to change.

USER: Ok, no issues. Thanks for the information.

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