You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Please book a flight ticket from IAD to SFO?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My journey dates are Sept 17 and Sept 19.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Justin Smith.

ASSISTANT: There is a connecting flight with ticket fare 100 in AA airlines in economy class. Is it ok for you?

USER: Go ahead.

ASSISTANT: Your booking is confirmed with flight number 1011. Depart time is 6:00 hours and arrival time is 22:00 hours.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.