Hi.
Hello, how may I serve you today?
I have made an reservation earlier. But, I need to change it due to some reasons. Can you help me with that?
Sure, I will help you with that.
Thank you.
May I know your good name?
 Sure, Sharon Wilson is my name.
Please wait for a moment.
Ok, take your time.
Thank you for waiting, sorry there is no reservation found on your name in our system data.
That's ok, thanks for your kind information.
Thank you for reaching us, we hope see you again.