Hi.
user
Hello, how can I help you today?
assistant
I want to change an existing reservation due to sudden change in my trip.
user
Please can I have your name?
assistant
I am John Martin.
user
Please give me a minute.
assistant
Ok.
user
Thanks for waiting, there is no reservation found with your name.
assistant
Not a problem. Thank you for your service.
user
Have a good day.
assistant