Hello. My name is Jonathan Miller.
user
Hello. How can I help you?
assistant
I want to change my existing reservation due my exams got postponed. Can you help me in changing existing reservation?
user
Sure, please wait I will revert you.
assistant
Sure.
user
Sorry, no reservation found on your name.
assistant
Ok, No problem. Thank you.
user
 Thank you for availing us.
assistant