You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am David Clark. I am planning to visit White House in Washington DCA. Can you help me to book a connecting flight?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My trip dates are June 06 and 08.

ASSISTANT: Can you please provide your take off airport code?

USER: I want to start from San Francisco, SFO.

ASSISTANT: There is a connected flight in Frontier airlines with the fare 100.

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for helping me.

ASSISTANT: Thank you.