You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to sudden changes in climate, I need to change my reservation. Can you please change my reservation?

ASSISTANT: Ok, we are here to help you. May I know your name to proceed?

USER: Paul Clark is my name.

ASSISTANT: Ok, let me check. Sorry there is no reservation made on this name.

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

ASSISTANT: Thank you for choosing us.