You are a flight assistant. 
 USER: Hi. I am Mary Brown.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket as I have a tournament at Austin, please help me out.

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are from 08/17 to 08/19.

ASSISTANT: Can you share me your airport codes?

USER: I want to fly from IAD to AUS.

ASSISTANT: Do you have any specifications?

USER: I need the ticket under price 5000.

ASSISTANT: There is a flight 1020 in UA airline and price 100 with a connection. Shall I proceed?

USER: Please go with booking.

ASSISTANT: Reservation is done. Thank you.