Hello.
Hello. How can I help you today?
I want to change my existing reservation, due to some health issue. Can you please help me out?
Sure, I can help you with that. May I know your name please?
My name is Kevin Davis.
Please wait for a moment.
Sure.
I have found your previous reservation on your name in our database. Can you please share your new preferable airport codes?
My travelling airport codes are SEA to LAS.
May I know your travelling dates, please?
I will start my journey on July 22 and return back on July 24.
Do you have any other specifications?
I need a connecting flight.
United Airlines are having a flight-1013 with single connection limit  with a fare of 100. Shall I proceed with booking?
Please proceed.
Kevin Davis, your booking is done in economy class.