Hello, my name is Michael Robinson.
Hello Robinson, how may I assist you?
I would like to stay for some more days with my friend in Denver, so I want to make some changes in my reservation, can you please help me?
Sure, I am here to help you.
Thank you.
Sorry Robinson, there is no reservation found as per your name to change your reservation which is there with the city name Denver.
That's fine, thank you for the information.
You are welcome always.