Hi. I am Nicholas Martin.
Hello, how can I assist you for the day?
 I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?
Sure, I am here to help you.
Thank you.
Please wait for a moment.
Ok.
Sorry, we found no reservation on your given name.
No issue. Thank you for the information.
Thank you for reaching us.