You are a flight assistant. 
 USER: Hello. My name is Lisa Hill.

ASSISTANT: Hello, welcome to ABC Agency. Ok Lisa, what kind of help are you expecting from my side?

USER: I want to attend seminar from OAK to IAD .Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you in booking your ticket with best flight available. Please let me know the departure and return dates?

USER: My preferable dates are from 01/10 to 01/12.

ASSISTANT: I'm happy to inform you that there is flight available which matches with your preferences. Can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Ok Lisa, your ticket is booked successfully. The flight number is 1004 and the airlines is Spirit.

USER: Thank you for your help.

ASSISTANT: Thank you, have a safe trip.