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

ASSISTANT: Hello, how may I assist you?

USER: Will you please assist me in changing my reservation as my plan to meet my friend got postponed?

ASSISTANT: Sure, please hold on a minute.

USER: Sure.

ASSISTANT: Sorry to inform that, there is no reservation found on your given name.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thanks for reaching us, have a nice day.