You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Help me in booking a flight from IAD to OAK?

ASSISTANT: Can I have your journey dates?

USER: I like to travel on July 27 to 29.

ASSISTANT: Do you need any connection limit?

USER: I prefer connection flight.

ASSISTANT: Do you need any other requirements?

USER: I want to travel in Normal-cost airlines.

ASSISTANT: May I know your name?

USER: I am Richard Wilson.

ASSISTANT: Delta Airlines is providing connecting flight on this route with a ticket fare of 200 and flight departs at 12:00 hours and arrives at 11:00 hours, shall I book your ticket in this flight?

USER: Proceed for booking.

ASSISTANT: Your ticket is confirmed in flight 1000.

USER: Thank you.

ASSISTANT: Thank you for choosing us.