You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Allen.

ASSISTANT: How can I help you at this moment?

USER: I would like to visit Austin to sell my house, can you please book me a ticket from Washington, IAD to AUS?

ASSISTANT: Sure, I am happy to help you in booking flight ticket. Can please mention your preferable travel dates for booking flight ticket? Please wait a moment, I will check flight availability in this route.

USER: I am planning to depart on 08/12 and would like to return on 08/14. Sure, I will wait for your response.

ASSISTANT: There is a flight available in this route as per your requested dates, airline is AA and connection limit of this airline is 1 with minimum fare of 100. Are you ok with this flight?

USER: I am ok with this. Please book my ticket with this airlines.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1003.

USER: Thank you for booking my ticket.

ASSISTANT: You are welcome Mary Allen.