Hello, I am Robert Campbell.
user
Hello, how may I help you?
assistant
Due to some emergency work, I want to change my reservation.
user
Sure, please wait a moment I'll check the details of your reservation.
assistant
Sure.
user
Sorry Robert, in my database I didn't found any reservation regarding your name.
assistant
Ok. Thank you.
user
Thanks for choosing us. Have a nice day.
assistant