Hello. I am Lisa Davis.
user
Hello, how can I help you?
assistant
I need to change my existing reservation, as my exam got postponed. Please help me in changing?
user
Sure, please wait for a moment.
assistant
Ok.
user
Sorry to say that, no reservation was found with your good name.
assistant
Ok, no issues. Thank you for your service.
user
Thank you for reaching us.
assistant