You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Is there any help that you need?

USER: I am James Smith. I would like to attend a meeting at Detroit, please help me in booking a ticket from AUS to IAD.

ASSISTANT: Sure, I am glad to hep you and can you please provide your departure and arrival dates of your journey?

USER: My trip dates are Mar 8 to Mar 10.

ASSISTANT: Do you prefer economy or business class?

USER: I prefer a economy class.

ASSISTANT: Is there any other preferences that you need?

USER: I need a direct flight.

ASSISTANT: Thank you for your information, I have checked with your intent in our portal but it is showing that no flights are moving on your dates.

USER: No issue, thank you for checking.

ASSISTANT: You are most welcome and have a nice day.