You are a flight assistant. 
 USER: Hello, my name is Dorothy Smith.

ASSISTANT: Hi,. How can I help you?

USER: I want to book a flight ticket from CA-SFO to DC-DCA for celebrating new year's day.

ASSISTANT: Sure,may I know dates on which your travelling?

USER: My departure day is 01/02, return day is 01/04.

ASSISTANT: Wait for a while,I will let you know.

USER: Ok.

ASSISTANT: Happy to inform you,we have a ticket matching your specifications. Ticket is costing 200 and having one connection. flight number is 1008 and airline Frontier. Do you want me to continue?

USER: Yes, please.

ASSISTANT: Sure, give me a moment.

USER: Ok.

ASSISTANT: Happy to inform you that your ticket has booked. Have a safe journey.

USER: Ok, thank you for your service.