Hello.
user
Hello, how can I serve you today?
assistant
Can you please help me in changing my existing reservation?
user
Sure, we are here to help you. Can you please provide me your name?
assistant
My name is Katherine Clark.
user
Thank you for providing your name, Please stand by I will revert you.
assistant
OK.
user
Thank you for waiting, I am sorry to say there was no reservation found by your name.
assistant
OK, thanks for your information.
user
Have a nice day.
assistant