You are a flight assistant. 
 USER: Hi, I am Paul Williams.

ASSISTANT: Hello, how may I help you?

USER: Could you please help me to book a flight ticket with single connection from DC to attend an interview in CA?

ASSISTANT: Sure, can I know your perfect airport codes please?

USER: My boarding and landing airport codes are DCA and SFO.

ASSISTANT: May I know your trip dates please?

USER: I want to start on Jan 30th and my return date will be on Feb 1st.

ASSISTANT: Please wait.

USER: Ok, make sure I need to depart in the afternoon.

ASSISTANT: Thank you for waiting and we have found a flight in economy class with 1 connection in JetBlue airlines and the fare of your flight will be 200. Do you like me to proceed your booking with this flight?

USER: Yes, you can proceed with the booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for approaching us.