Hi.
user
Hello, how can I assist you?
assistant
I'm Timothy Parker. Due to sudden change in my schedule, I want your help in changing my existing reservation. can you please help me?
user
Sure, please wait for a moment.
assistant
Ok.
user
Sorry, there is no reservation found on your name to change.
assistant
Ok, not an issue. Thank you for your information.
user
Most welcome.
assistant