Hello.
user
Hello.
assistant
I am Gregory Jackson.
user
Gregory Jackson, how can I assist you for the day?
assistant
I want to change my existing reservation, can you please help me with that?
user
Sure, I will help you with that  cancellation. Please hold for a moment, let me check your previous reservation status.
assistant
Sure, take your time.
user
Sorry to say that, there is no reservation found with your name in our database to cancel it.
assistant
Ok, no problem. Thank you for your time.
user
You are welcome, thank you for contacting us. Have a great day.
assistant