You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Austin with my friends as a business trip. Can you help me to book a ticket?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My airport codes are DFW-AUS.

ASSISTANT: Ok, when would you like to depart and return?

USER: My journey dates are 11/11 and 11/13.

ASSISTANT: May I know your name please?

USER: Katherine Taylor here.

ASSISTANT: Ok, we found a Southwest airline, flight number: 1000, price: 100 with one connection.

USER: Please do the booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.