You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: May I know your good name please?

USER: Kimberly Phillips is my name.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.