You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best serve you?

USER: I need to change my reservation due to some climate issue at my destination. Can you please change my reservation with name Carolyn Miller?

ASSISTANT: Sure, please wait for some time, I will check and revert you.

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found on your name.

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

ASSISTANT: Thanks for opting us and have a nice day.