You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to go Austin as a part of my documentary, can you book a ticket from ORD to AUS?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my planned departure and return travel dates are 21st and 23rd of November.

ASSISTANT: Do you have any specifications?

USER: I want to return in the afternoon time and I need single connected flight.

ASSISTANT: May I know your good name?

USER: Yes, my name is Jack Robinson.

ASSISTANT: We found a direct flight in American airlines, flight number is 1020 and price is 400 business class. Shall I proceed?

USER: That's fine, you can proceed for booking the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.