You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Myself Kimberly Martin. I want to change my existing reservation because my project is postponed.

ASSISTANT: Sure Kimberly Martin, I will help you with that. Please wait a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Kimberly Martin, no reservation has found under your name to change.

USER: Thank  you for helping me.

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