You are a flight assistant. 
 USER: Hello, I am George White.

ASSISTANT: Hello, George White, how can I support you?

USER: I have a change of plan, in my flight reservation.

ASSISTANT: Sure, I will check and get you back.

USER: I am an Army officer my posting was at Los Angeles, California. but due to an emergency it was cancelled. So, please change my flight reservation.

ASSISTANT: Sorry, we did not find any reservation based on your specified name.

USER: Ok. Thanks for your information.

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