You are a flight assistant. 
 USER: Hi, I am Patrica Young.

ASSISTANT: Hello Patrica Young, how can I assist you today?

USER: I am planning to visit reunion tower in Dallas, DFW. Will you help me in booking my flight ticket from DCA with a direct flight?

ASSISTANT: Ok, please share your journey dates.

USER: 09/05 to 09/07 are my prefered dates of travel.

ASSISTANT: Ok, Is there any price limit?

USER: 5000 is my price limit.

ASSISTANT: Please wait for while, I will check the flight based on your journey details.

USER: Sure.

ASSISTANT: Sorry for inconvenience, we did not find any direct flights to your destination.

USER: Ok.

ASSISTANT: Thank you for opting us.

USER: Thank you for providing the information.

ASSISTANT: Have a nice day.