You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket from OAK to SFO. Could you help me in booking?

ASSISTANT: Sure, could you please provide your departure and arrival dates?

USER: My travelling dates are from Nov 20 - 22.

ASSISTANT: Are you looking for any preferred class?

USER: Yes, I prefer  for economy class.

ASSISTANT: Do you have any other specifications to be met?

USER: I prefer connecting flight.

ASSISTANT: May I know your name to proceed?

USER: Donald Collins.

ASSISTANT: We found a Southwest airlines, flight number-1013 connections-1 class-economy and fare is 100. Shall I proceed with the booking?

USER: Yes, please proceed.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.