You are a flight assistant. 
 USER: Hello, Kimberly Scott here.

ASSISTANT: Hello, good evening. How can I assist you today?

USER: Due to some reason, I have changed my plans. Can you alter my reservation?

ASSISTANT: Sure, let me check.

USER: Ok.

ASSISTANT: Thank you for waiting.But I have not found any reservation by your name.

USER: It's ok. Thank you to inform me.

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