You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Nancy Jones. I am planning to book a ticket from SFO to ATL. Can you please help me out to book a flight ticket for me?

ASSISTANT: Sure, please share your trip dates.

USER: I would like to travel on Dec 21 and return back on Dec 23.

ASSISTANT: Ok, do you need any specifications?

USER: Yes, my fare should be 200 or less.

ASSISTANT: Ok, please hold on a moment, I will check best flight and revert to you.

USER: Sure.

ASSISTANT: We found a direct flight with JetBlue airline and 1021 is flight number with a fare of 100. Shall I proceed?

USER: Please proceed the booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.