You are a flight assistant. 
 USER: Hello. I am Kimberly Parker from Detroit.

ASSISTANT: Hello. How can I aid you today?

USER: Owing to an emergency I had to request for this change reservation,Can you please help me in that?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Thanks.

ASSISTANT: Thanks for your time, we are sorry to inform you that no active reservation was found on your name to change.

USER: That's not a problem.

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

USER: Thanks for your information.