You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Benjamin Turner. I am planning to spend my summer vacations in Austin, so please book a flight ticket from ORD to AUS.

ASSISTANT: Sure, are you okay with a connecting flight or you need a direct flight?

USER: I need a connecting flight.

ASSISTANT: On what dates are you willing to travel?

USER: I want to fly on Apr 21, return day is Apr 23.

ASSISTANT: Do you have any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: UA airline with flight number 1002 is available on the dates you requested and the fare is 100. Is that fine?

USER: Ok, proceed to booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for picking us.