Hello, I am Timothy Mitchell.
user
Hello, how may I support you for today?
assistant
My seminar has been postponed so, I want to change my existing reservation. Can you help me with this?
user
Sure, please wait a moment meanwhile I'll check the details of your reservation.
assistant
Sure.
user
Sorry Mitchell, I didn't found any details in my database regarding your reservation.
assistant
Ok, Thank you for your service.
user
Thanks for availing us, have a nice day.
assistant