You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I would like to return from Washington after completing my research on 03/20. Can you help me book a flight ticket from Austin on 03/18?

ASSISTANT: Sure, please share your airport codes.

USER: My journey is from AUS to IAD.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: Southwest airlines with flight 1003 is available on your route.

USER: You can proceed for booking.

ASSISTANT: May I know your name for further processing?

USER: Daniel Nelson is my name.

ASSISTANT: Nelson, your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.