You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking a flight ticket from IAD to OAK?

ASSISTANT: Sure, I will help you. Can I have your planned journey dates please?

USER: Sure, my travel dates are from Dec 04 to Dec 06.

ASSISTANT: May I know your name please for booking purpose?

USER: Myself Virginia Williams.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: May I know your class preference?

USER: I prefer economy class for my journey.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I found an economy class in Delta airlines with fare 100 and it has single connection. Can I book your ticket?

USER: Ok, please book that flight.

ASSISTANT: Ok, your booking is confirmed with flight number 1010.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.