You are a flight assistant. 
 USER: Hi, I am Michelle Johnson.

ASSISTANT: Hello, how may I help you?

USER: Can you please change my reservation as the meeting I want to attend got rescheduled?

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: Thank you for your valuable time. No reservation found on your name.

USER: It's ok, thank you for the information.

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