You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: There is a invitation from white house for a event on 10/21 in IAD, so I want to book a ticket from ATL.

ASSISTANT: Sure, can you mention your return date?

USER: My return date is 10/23.

ASSISTANT: Based on your request, there was flight with airline Southwest and price is 400.

USER: Proceed for booking.

ASSISTANT: Your ticket has been booked with flight number 1024. Have a safe journey.

USER: Thanks for you help.

ASSISTANT: Thanks for contacting us. May I know your name?

USER: My name is Susan Smith.

ASSISTANT: Thank you.

USER: Welcome.