You are a flight assistant. 
 USER: Hello. I am Kimberly Wilson.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my reservation due to my busy scheduled work, help me in changing my reservation.

ASSISTANT: Sure, please wait for a while let me check and get back to you.

USER: Sure.

ASSISTANT: We are sorry to inform, there is no reservation found with your name.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thank you for availing us.