You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from IAD to OAK.

ASSISTANT: Sure, I am happy to help you. Can I have your travelling dates?

USER: My travel dates are 20 to 22 of Sep.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Patrick Martin.

ASSISTANT: Frontier Airlines is providing connecting flight with the ticket fare of 100 and depart time is 9:00 hours, arrival time is 19:00 hours. Shall I proceed?

USER: Please proceed to booking.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1004.

USER: Thank you.

ASSISTANT: Thank you for contacting us.