Hello.
Hello. How may I aid you?
Myself Sandra Mitchell, I need to change my existing booking.
Sure, I can help you to change the details.
Thank you.
May I know your name to check the ticket status?
Sandra Mitchell here.
Ok, please give me a minute.
Sure, take your time.
I have found your existing reservation. Can you please tell me your airport codes?
ATL and LGA are the airport codes.
Ok, can you please tell me your changed travel dates?
February 16 and 18 are the travel dates.
There is a flight in the UA airlines with the connection limit 1 and the ticket fare is 200. Can I proceed with this flight?
Great! Please book this ticket.
Ok, I have changed the details and  booked a new ticket with the flight number 1000. Have a safe flight.
Thank you for the assistance.
You are most welcome. Thank you for reaching us.