You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to book a flight from IAD to OAK?

ASSISTANT: Sure, I will help you. Can you please help me with your planned travel dates?

USER: My travelling dates are Apr 24 and 26.

ASSISTANT: May I know your name please?

USER: My name is Kevin Evans.

ASSISTANT: Do you need a connecting flight?

USER: I prefer connecting flight.

ASSISTANT: May I know your specific timings of your journey?

USER: I am fine at any time.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I found an economy class in Frontier airlines with fare 100 and it is a direct flight. Can I book your ticket?

USER: Proceed with booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1003.

USER: Thank you.

ASSISTANT: Thank you for approaching us.