Hi.
user
Hello. How may I help you today?
assistant
I am Gary White. I want to change my reservation due to sudden prepone of my exams, can you change my reservation?
user
Sure, please wait a moment.
assistant
Sure.
user
Thank you for waiting, there is no reservation found by your name.
assistant
Ok, thank you for informing me.
user
Thank you for approaching us.
assistant