You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist 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.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: I am Karen Carter.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Mr. Karen Carter, there is no reservation found as per your name in our database.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us with a query.

USER: Thanks for the information.