Hello, my name is Michael Robinson.
user
Hello Robinson, how may I assist you?
assistant
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?
user
Sure, I am here to help you.
assistant
Thank you.
user
Sorry Robinson, there is no reservation found as per your name to change your reservation which is there with the city name Denver.
assistant
That's fine, thank you for the information.
user
You are welcome always.
assistant