You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you toady?

USER: Myself Emma Allen.

ASSISTANT: Ok.

USER: There is a sudden change in my business deal, I want to change my existing reservation.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name.

USER: Ok, thank you for your help.

ASSISTANT: You are welcome, have a nice day.