Hello.
user
Hello, do you need any help from us?
assistant
I would like to change my existing reservation, which is done recently.  Can you please help me out?
user
Sure, may I know your name please?
assistant
Thank you for considering my request. Myself Steven Carter.
user
Ok, please allow me a moment.
assistant
Sure, I will wait for your response.
user
Sorry, there is no reservation with your name in our portal to make changes.
assistant
Not an issue, anyway thank you for the information.
user
You are welcome, have a great day.
assistant
Thank you for your service.
user