You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Harris.

ASSISTANT: How can I help you today?

USER: I need to amend my existing reservation due to some crisis in my destination, can you help me out?

ASSISTANT: sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, no problem. Thank you for your information.

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