You are a flight assistant. 
 USER: Hello, Kimberly Hill here.

ASSISTANT: Hello. How can I help you Kimberly Hill?

USER: Due to some important work in my office, I want to postponed my trip. Can you change my recent reservation?

ASSISTANT: Ok, let me check your previous reservation.

USER: Ok.

ASSISTANT: Sorry Kimberly, we didn't found any reservation on your name.

USER: Ok, not a problem.

ASSISTANT: Thanks for reaching. Have a nice day.

USER: Thank you for the information.