You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Steven Turner.

ASSISTANT: How may I assist you?

USER: I would like to visit Umlauf Sculpture Garden and museum located at Austin.So I need to fly from Washington. Can you please assist me in booking a flight ticket?

ASSISTANT: Please specify your journey dates.

USER: I would like to travel on 11/22 from Washington. I intend to return on 11/24.

ASSISTANT: Please provide your journey codes.

USER: My journey codes are from DC-DCA to TX-AUS.

ASSISTANT: No flights found.

USER: Ok, no worries at all. Thank you for your information.

ASSISTANT: Thanks.