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