You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Kimberly White here.

ASSISTANT: Yes, White.

USER: Can you change my reservation?

ASSISTANT: Sure, I am here to help you out. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry White, there is no reservation on your name in our data.

USER: It's ok. Thank you for your help.

ASSISTANT: Thank you for your help.