Hi.
user
Hello.
assistant
I am Dorthy Thomas.
user
How can I assist you?
assistant
I want to change my existing my reservation due to postpone of my exams, so can you help me with this?
user
Ok, please wait I will check and revert you in a moment.
assistant
Sure.
user
 Sorry to inform you that no reservation was found on your name.
assistant
Not a problem, thank you for the information.
user
 Thank you for availing us.
assistant