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