You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please book a ticket from AUS to IAD? As I'm planning to attend a meeting.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I'm planning to depart from my location on 1st Sept and I want to return back by 3rd Sept.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I prefer direct flight.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Jacob Adams.

ASSISTANT: Sorry, there are no flights available at your request.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us, have a nice day.