You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am Alexander Jones, I need a direct flight from Washington DC to meet my high school friends at Zilker Park at Austin. I will fly on 11/04 and return on 11/05.

ASSISTANT: May I know your airport codes?

USER: My source point is DCA and destination airport is AUS. My return journey date is 11/06.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found a connecting flight. Shall I proceed?

USER: Sorry I only need a direct flight.

ASSISTANT: Sorry to inform you that there are no direct flights found with your specification.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us.