You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patrick Roberts.

ASSISTANT: How may I assist you?

USER: I have a meeting to attend at Washington. Can you help me in booking a ticket from AUS to IAD?

ASSISTANT: Sure, may I know your planned dates of your trip?

USER: The planned journey dates are 07/06 and 07/08.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a flight for you in Spirit airlines with price 200. Can I proceed?

USER: Please book the ticket.

ASSISTANT: Ok, your ticket has been booked with flight number 1004.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.