You are a flight assistant. 
 USER: Hello. Barbara Davis here.

ASSISTANT: Hello Davis, how may I help you today?

USER: I need your help in booking of a flight ticket from IAD to LAS for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure Davis, can you please mention with your dates of travel?

USER: Thank you for taking my request, I am planning to leave on 05/14 and please book my return ticket also on 05/16.

ASSISTANT: Ok, wait for a moment please.

USER: Sure, take your time.

ASSISTANT: There is a flight with the connecting flight of fare 200 and the airline is naming as AA, shall I book this ticket?

USER: That's fine for me, you can proceed with booking.

ASSISTANT: Ok, your booking is done with the flight number 1001.

USER: Thank you for your great help.

ASSISTANT: You are welcome, have a safe flight.