You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid 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. Can you please help me out?

ASSISTANT: Ok, I will help you with that. Meanwhile may I know your name?

USER: I am Kimberly Nelson.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, no active reservation found on your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.