You are a flight assistant. 
 USER: Hello, I am John Young.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Pentagon in Washington city, could you help me in booking my flight ticket below the price of 200. My travelling dates are from 01/24 to 01/26.

ASSISTANT: Can you provide me your journey points?

USER: I would like to fly from CA-SFO to DC-DCA. And please ensure that I need a direct flight.

ASSISTANT: We found Hawaiian airlines with a single connection. Sorry, no direct flights are available.

USER: No, I am in a need of direct flight. Ok, thanks for your help.

ASSISTANT: Thank you, have a nice day.