Hello, I am Joseph White.
user
Hello, how can I aid you today?
assistant
I need to change my existing reservation, as my exam got postponed. Please help me in changing?
user
Sure, I will help you. Please wait a moment.
assistant
Ok.
user
Sorry, there is no reservation found on your given details.
assistant
Ok, no issues.
user
Thanks for choosing us.
assistant
Thank you for your help.
user