Hi.
Hello. How may I aid you?
I am John Wilson, can you help me for changing my existing reservation?
Sure, please wait for a moment to check your details.
OK.
I have found your reservation, can you help me with your new airport codes?
My airport codes are LGA to MSP.
May I know your dates?
My travelling dates are 02/08 and 02/10.
Please wait for a moment. Sorry, no flight available for you on your requested dates.
Oh! It's ok no problem, thank you for your services.
Thank you for choosing us, have a nice day.