Hi.
user
Hello, how can I help you?
assistant
Owing to an emergency, my planned trip to Yosemite adventure got postponed. So I request you to change my existing reservation.
user
Sure, may I know your name please?
assistant
Sure, Gary Nelson here.
user
Ok, please wait for a while.
assistant
Sure.
user
Sorry to say that, there was no reservation found with your given name.
assistant
Ok, no issues. Thank you for your assistance.
user
Thank you for choosing us.
assistant