Hi.
user
Hello. How may I help you today?
assistant
Owing to an emergency, my live concert got postponed, so I want you to change my existing reservation.
user
Sure, I will help you with that. Can I have  your good name please to check your reservation status?
assistant
Sure, Sandra Edwards here.
user
Ok, please wait a moment.
assistant
Sure.
user
Sorry to inform you that no reservation has found under your name to change.
assistant
Ok, no worries at all. Thank you for your assistance.
user
Thank you for choosing us, have a good day.
assistant