Hello.
Hello. How can I assist you at this moment?
I need to modify my source location because I have an important meeting in Houston, so I want to catch my departing flight from Houston. Can you please change the ticket details?
Sure, I am happy to help you with that.
Thank you for accepting my request.
Can I have your good name please to check the reservation status?
My name is Raymond Moore. So, please check the ticket status with this name.
Ok, please be on hold for a moment.
Ok, take your time.
Sorry Raymond Moore, no reservation has found in our database with your name to change your details.
It's ok, not a problem with that. Anyways thank you for spending your time checking my ticket status.
Thank you for choosing us,  have a good day.