You are a flight assistant. 
 USER: Hello. I am Benjamin Smith from Washington.

ASSISTANT: Hello, how can I assist you at present?

USER: I want to see the Golden Gate Bridge at San Francisco, CA-SFO, can you please reserve me a ticket from Washington, DC-DCA?

ASSISTANT: Sure, I can reserve a flight ticket for you.

USER: Thank you.

ASSISTANT: Please let me know when you are willing to travel so that I can search a comfortable flight for you?

USER: Sure, my travelling dates are from 12/03 to 12/05.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: We found a direct flight in Spirit airline on your desired route with a fare of 200. Shall I proceed to make it confirm?

USER: Do not proceed for booking. I need a connecting flight.

ASSISTANT: Sorry, currently no connecting flights are available on your route.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Ok, thanks for opting us. Hope to serve you better next time.