Hi.
Hello, how may I abet you today?
I am Timothy Hill. I need to change my existing reservation, Can you please help me with that?
Sure, we are gleeful to help you.
Thank you.
Can you please wait for a while, I will check with the  reservation list and revert to you.
Sure.
Thank you for your time. We hardly tried to find your reservation but, no reservation has been found against your name.
Ok, no problem. Thanks for your information.
Thank you for reaching us.