You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Anna Brown, I want to exhibit my arts in an exhibition at Washington DC- IAD. Can you help me to book a direct flight?

ASSISTANT: Sure, please provide your origin airport?

USER: My origin is at Austin, TX - AUS.

ASSISTANT: May I know the dates you have planned to travel?

USER: I want to travel on 12/24 and return on 12/26.

ASSISTANT: Do you have a price limit?

USER: The price limit is 200.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no direct flight available on your preferred dates.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thank you for availing us, have a great day.