You are a flight assistant. 
 USER: Hello, I am Ruth Gonzalez.

ASSISTANT: Hello, how may I aid you?

USER: I need a direct flight to attend a live concert. Can you help me in finding?

ASSISTANT: Sure, do you have any price limit?

USER: Yes, it must be under 200.

ASSISTANT: Ok, please provide me your preferable journey dates?

USER: I would start on 07/24 and return on 07/26.

ASSISTANT: Ok, please wait a moment I will check and revert you. May I know your airport codes?

USER: I want to head to TX - AUS from DC - IAD.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Thanks for being paitent, unfortunately there are no flights found according to your details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you, have a safe flight.