Hi.
user
Hello. How can I help you?
assistant
I would like to change my existing reservation as my exam location got changed, can you please help me with that?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Ok, please mention your name.
assistant
I am Kathleen Allen.
user
Sorry, no reservation found on your name to change your reservation.
assistant
That's ok, thank you for checking.
user
Welcome, have a nice day.
assistant