Hello, I am Donald Hill.
user
Hello, how can I aid you?
assistant
My tennis match has been postponed due to rainfall, I would like to change my existing reservation. Can you please help me?
user
Ok, please wait I will revert you in a moment.
assistant
Sure.
user
Sorry, no reservation was found on your name.
assistant
Ok, no worries at all. Thank you for your great information.
user
 Thank you for availing us.
assistant