You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I help you?

USER: Myself Sharon Robinson. I want to enter into the Marketing business field, So I want to attend Marketing and Business Development Conference in Washington. So please help me with booking a connecting flight.

ASSISTANT: Sure, May I know the journey codes?

USER: Sure, my source point is AUS and destination is IAD.

ASSISTANT: Please help me with your travel dates.

USER: I will start on 08/18 and return back on 08/20.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No issue, thank you for your time.

ASSISTANT: Thank you for opting us.