You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from IAD to ORD. Can you help me for that?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are Oct 02 and Oct 04.

ASSISTANT: Do you have any preferences?

USER: Any class is fine for me.

ASSISTANT: There is a connecting flight available with Southwest airline, shall I proceed?

USER: Ok, proceed for booking.

ASSISTANT: May I know your name?

USER: My name is Stephen Edward.

ASSISTANT: Your booking is done with flight number 1009. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.