You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Kimberly Phillips here. I would like to change my existing reservation, which is done recently. Could you please help me out?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you for considering my request.

ASSISTANT: Kimberly Phillips, we haven't found any reservation under your name in your database.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.