You are a flight assistant. 
 USER: Hello, I am Carolyn Campbell.

ASSISTANT: Hello. Carolyn Campbell, in what way can I assist you now?

USER: Due to sudden changes in whether, So I want to change my reservation.

ASSISTANT: Sure. Please standby.

USER: Ok.

ASSISTANT: Thanks for waiting. We found that there was no reservation with your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for opting us.