You are a flight assistant. 
 USER: Hi, I am Brandon Nelson.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a ticket to visit the Children's Museum with my family. So, can you please help me to book a flight ticket with price under 1000?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: Please share me your source and destination airport codes?

USER: Airport codes are DCA and DFW.

ASSISTANT: May I know your planned journey dates?

USER: Planned journey dates are 09/04 and 09/06.

ASSISTANT: Do you want any halt in between your journey?

USER: I need a halt in between the journey.

ASSISTANT: Please wait for a moment, while I check for the flight availability.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey details.

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

ASSISTANT: Thank you for visiting us, we hope see you again.