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

ASSISTANT: Hello, how may I help you?

USER: Due to an emergency work, my meeting has been postponed.Could you please help me in changing?

ASSISTANT: Sure, please hold on a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: Ok, no problem at all. Thank you for your information.

ASSISTANT: Thank you for reaching us.