Hi. I am Kenneth Martinez.
Hello, how can I provide assistance for you?
  Recently I made a reservation to enjoy the sports meet at Washington, but my manager assigned a work on that dates, so I need to cancel my reservation. Can you please help me in that?
Sure, I am here to help you.
Thank you.
Please wait for a while, I will check your previous reservation.
Sure, I'll wait.
Thank you for being patience, there is no active reservation found on your name.
Ok, no problem. Thanks for your quick response.
Thank you for reaching us.