You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Margaret Brown.

ASSISTANT: How may I assist you?

USER: I am looking for a flight from IAD to AUS, can you help me in booking the flight ticket?

ASSISTANT: Sure, I will help you. Can you please provide your planned travel dates?

USER: Sure, my depart day is Jan 23 and return day is Jan 25.

ASSISTANT: Please hold on a moment.

USER: Sure, please look for a connecting flight.

ASSISTANT: I found an economy class ticket in AA airlines with fare 100 and 1 connection. Can I book your ticket?

USER: That's fine, please proceed in booking with this flight.

ASSISTANT: Ok, your booking is confirmed with flight number 1025.

USER: Thank you for your expeditious service.

ASSISTANT: Thank you for approaching us.