Hoi.
user
Hello, how may I help you?
assistant
I am David Davis. I need to change my existing reservation as my exams got postponed, Can you please help me with that?
user
Sure, I am here to help you. Please wait for a moment to check your details.
assistant
Sure.
user
Sorry to say, no reservation found on your name.
assistant
Ok, no problem.
user
Thank you for reaching us, have a nice day.
assistant
Thanks for your information.
user