You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Robert Clark. I would like to visit Washington to meet my brother, can you please help me to book a flight ticket from AUS to IAD?

ASSISTANT: Sure, help me with the travel dates?

USER: Sure, my journey dates are Aug 25 and Aug 27.

ASSISTANT: Do you have any other preferences?

USER: My return time is evening.

ASSISTANT: We have an economy class, connecting flight operated by American Airlines with a fare of 100. Is it ok for you?

USER: Ok, please confirm the booking.

ASSISTANT: I have booked your ticket in flight-1009. It departs at 0:00 AM AUG 25 and arrives at 22:00 PM AUG 27.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.