Hi.
Hello.
 I am Gary Allen.
How can I assist you today?
 I want to change my existing reservation, please help me out.
Sure, will you please give me a moment?
Ok.
Thanks for waiting, your reservation is found. Will you mention your travelling dates please?
My travelling dates are from Dec 30th to Jan 1st.
Please provide your airport codes that you want to travel.
My source code is DEN and destination code is IAH.
Please give me a moment.
Ok.
Thanks for waiting, there is a flight with price 200 and the connections 1 is available. Shall I confirm your ticket?
Please proceed.
Your ticket is booked. The flight number is 1029 and the airline is JetBlue.
Thanks for the reservation.
Welcome, have a great day.