Hi. I am Jason Jones.
Hello, how may I serve you at this moment?
Due to my health problem I want to change my existing reservation, can you please help me to change my reservation?
Sure, we are here to help you.
Thank you.
Please wait for a while, let me check with your reservation status and revert to you.
Sure.
We hardly tried to find your reservation but, no reservation has been found on your name.
Not a problem, thanks for checking.
Thank you for rendering our services.