Hello.
Hello, how can I help you?
I am planning to change an existing reservation, due to health issue.Can you please change my reservation?
Sure, I am happy to help you in changing  the ticket details.
Thank you.
Can I know on which name you  have booked your existing reservation?
I am Donna Barker.
Donna Baker, I have found your existing reservation. Could you please tell me your planned journey dates?
Sure, I am planning to travel on Feb 10 and return back on Feb 12.
Ok. what are your origin and destination airport codes?
My airport codes are HOU to DEN.
Ok, do you need a single connecting flight or a direct flight?
I am looking for a connecting flight.
Is there any class preference?
No.
Ok, please give me sometime to check the flights in this route.
Sure.
I have found a flight which is having a connection limit 1 and the ticket cost is 300 in an economy class. Shall I proceed to book the ticket?
That's fine, please proceed the booking.
I have changed the ticket details and I have reserved the flight ticket in Spirit airlines, flight number is 1003 which departs at 14:00 PM and returns at 21:00 PM.
Thank you for your service.
Have a nice journey.