You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I am here to help you.May I know your name please?

USER: I am Kimberly Walker.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Walker, there is no flight found as per your name in our database.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us with a query.