You are a flight assistant. 
 USER: Hello, I am Emily Rodriguez.

ASSISTANT: Hello, how can I support you?

USER: I have to report in an organization on 17th Aug, help me with booking the flight ticket.

ASSISTANT: Sure, please provide your airport codes?

USER: I need a direct flight with Origin airport as Houston, TX- HOU and Dest airport as Washington DC- DCA.

ASSISTANT: Ok, may I know your arrival date?

USER: My journey dates are from 08/16 to 08/18. The ticket should be within the price limit 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights found with your provided details.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us.

USER: Thank you for reaching us.