You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from SFO to BOS.

ASSISTANT: Can I know your trip dates?

USER: My travel dates are 17 to 19 of May.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: United Airlines is providing direct flight on this route with a ticket fare of 200 and flight departs at 16:00 hours and arrives at 16:00 hours, shall I book your ticket in this flight?

USER: Please proceed to booking.

ASSISTANT: May I know your name?

USER: I am Carol Johnson.

ASSISTANT: Your ticket is confirmed in flight 1003.

USER: Thank you for helping me.

ASSISTANT: Thank you for opting us.