You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Margaret Walker here.

ASSISTANT: How can I aid you at this moment?

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

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to leave on 10/13 and please book my return ticket on 10/15.

ASSISTANT: Just give me a moment, I will check is there any flight available or not in this route as per your requested dates.

USER: Ok, take your time.

ASSISTANT: Based on your information, AA airline is ready to serve you with 1 connection with a minimum fare of 200 is available for you. Shall I proceed with this?

USER: I am comfortable with this, you can proceed with booking.

ASSISTANT: I have confirmed your flight ticket, flight number is 1003.

USER: Thank you for your help in booking of my ticket.

ASSISTANT: You are welcome Margaret Walker.

USER: Welcome.