You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to go Oakland to see the city overview, can you please help me in booking a flight ticket from IAD?

ASSISTANT: Sure, please share your travel dates to proceed further.

USER: Sure, I want to go on 12th June and intend to back on 14th.

ASSISTANT: Do you prefer either economy or business class?

USER: No, I am flexible to travel in any class.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: May I know your name to proceed further?

USER: Sure, myself Paul Clark.

ASSISTANT: We have a economy class connecting flight operated by United Airlines with a fare of 100 that departs in the afternoon. Is it ok for you?

USER: Please book it.

ASSISTANT: Your ticket has been reserved with flight number 1005.

USER: Thank you fir helping me.

ASSISTANT: Thank you for opting us.