You are a flight assistant. 
 USER: Hello, I am Donald Young.

ASSISTANT: Hello, how may I aid you today?

USER: I need to book a flight ticket to Austin for my brother's wedding shopping, please help me in booking from SEA to AUS?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My planned trip dates are from 12/27 to 12/29.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight, within the fare of 500.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We found a flight with UA airlines, flight number is 1000 with one connection and price is 100.

USER: Ok, go ahead.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for choosing us.