You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend a Seminar in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your name please?

USER: My name is Catherine White.

ASSISTANT: May I know your travelling airport codes please?

USER: My travelling dates are Apr 01 and Apr 03. I prefer normal cost airline.

ASSISTANT: Ok, may I know your connection limit please?

USER: I prefer direct flight.

ASSISTANT: Please share your airport codes.

USER: My airport codes are IAD and ORD.

ASSISTANT: Sorry White, there is no flight found as per your travelling details.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.