Hello.
user
Hello, how may I help you?
assistant
 I am Thomas Brown want to change my reservation due to prepone of my cricket match. Can you help me with it?
user
Sure, we are here to help you. Can you please wait a minute?
assistant
 Ok.
user
Sorry, Thomas Brown. We could not found any reservation on your name.
assistant
thank you for your response.
user
Thank you for opting us.
assistant