You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Scott Hall.

ASSISTANT: How can I aid you today?

USER: I want to visit beach festival at Dallas, please book a direct flight.

ASSISTANT: Sure, I will help you. May I have your trip dates?

USER: My travelling dates are from 03/22 to 03/24.

ASSISTANT: Please send the trip codes.

USER: My source code is DCA and Destination code is DFW.

ASSISTANT: Ok. Please wait, I will revert to you.

USER: Ok.

ASSISTANT: Thanks for your time. No flights are found in search.

USER: No issues, thank for the help.

ASSISTANT: Thank you.