You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from Washington, DCA to reach San Francisco, SFO?

ASSISTANT: Sure, please share me your planned journey dates?

USER: My journey dates are from Dec 25 to Dec 27.

ASSISTANT: Please mention your connection limit?

USER: Usually I prefer direct flight, If it is not there please proceed with single stopover flight.

ASSISTANT: Ok, do you have any preference related to class?

USER: No, thanks for asking.

ASSISTANT: Is there any requirement related to booking?

USER: No.

ASSISTANT: May I know your good name?

USER: My name is Nicholas Harris.

ASSISTANT: I found a connecting flight 1001 of airline Frontier, fare is 100 and class is economy. Shall I proceed with booking?

USER: Sure, you can proceed for booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us, have a nice journey.