Hello.
user
Hello, how can I assist you?
assistant
I need to alter my existing reservation, as my exam scheduled has been postponed. Please help me in changing?
user
Ok, please wait a moment. May I know your name?
assistant
I am Jack Clark.
user
Sorry, there is no reservation found on your name.
assistant
Ok, no worries. Thanks for your service.
user
Thank you.
assistant