You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: During sunny weather I planned to change my recent reservation.

ASSISTANT: May I know your name please?

USER: Stephanie Carter.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you. Thanks for waiting. Sorry, there is no reservation found with your name.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.