Hello. I am Andrew Hernandez.
user
Hello, how can I help you today?
assistant
I would like to change my existing reservation due to postpone of my exams. Could you please help me?
user
Ok, please wait a moment.
assistant
Sure.
user
Sorry to say, no reservation found with your name.
assistant
No worries, thank you for the information.
user
Thanks for reaching us.
assistant