Hello.
user
Hello. How may I help you today?
assistant
I want to do some changes in my existing reservation. Can you help me for that?
user
Sure, can I have your name to check with the details.
assistant
My name is Dennis Johnson.
user
Please wait a moment.
assistant
Sure, I will wait for your response.
user
Sorry, there are no active reservations on your name to change.
assistant
That's ok, thank you for checking.
user
Thank you for reaching our service.
assistant