Hi, Karen Gonzalez here.
user
Hello, how may I help you?
assistant
Owing to an emergency, my appointment with dentist got postponed. So I want you to change my existing reservation.
user
Sure, please wait for a while.
assistant
Sure.
user
Sorry, no reservation found on your given name.
assistant
Ok, no worries at all. Thank you for your assistance.
user
Thank you for choosing us.
assistant