Hello, Robert Wilson here.
Hello. Robert Wilson, how can I help you?
I want to visit White House in IAD, can you please help me to book the flight ticket from IAD?
Sure, may I know on which dates you would like to travel?
I would like to  travel on 04/30 and 05/02.
Wait a moment please.
Sure.
Flight-1009 of Frontier airlines of price 200 available for you. Shall I book it?
Ok, please book the ticket.
Your ticket is confirmed.
Thank you for your service.
Thank you and have a safe journey.