Hello, I am Melissa Nelson.
Hello, how may I help you?
As I want to attend to my sister's birthday party, I want to book a flight.
Sure,To reserve a ticket I need to know your journey details?
I want to fly from Denver CO-DEN to Orlando FL-MCO. The dates are from 10/19 to 10/21 and  price limit  is 1000.
Please wait a moment.
OK.
We are happy to inform you that there is a flight found on your given information.
May I know the airline details?
Flight details are Flight number:1019, airline: Southwest with price limit 100. Shall I proceed for the booking?
Yes, you can proceed.
Your ticket has been confirmed. Thank you.