Hi, I am Gregory Johnson.
user
Hello, how can I assist you for the day?
assistant
Owing to an emergency, my planned trip to Washington got postponed. So I want you to change my existing reservation.
user
Sure, I am here to help you. Please wait for a moment.
assistant
Sure.
user
Sorry, we found no reservation on your given name.
assistant
Ok, not an issue. Thank you for your help.
user
Thank you for reaching us.
assistant