Hi.
user
Hello, how can I help you today?
assistant
Owing to an emergency, my business conference got postponed, so I want you to change my existing reservation.
user
Sure, I am here to help you with that. Can you please share me your name?
assistant
Sure, William White here.
user
Please wait a moment.
assistant
Sure.
user
Sorry, there is no active reservation found on  your name.
assistant
Ok, no worries at all. Thank you for your assistance.
user
Thank you for reaching us, have a nice day.
assistant