Hello.
user
Hello,how can I serve you?
assistant
 I need to change my  recent reservation.
user
May I know your name please?
assistant
My name is Jeffrey Taylor.
user
OK, please wait for a minute.
assistant
Sure.
user
Thank you for waiting, unfortunately there is no reservation on your name.
assistant
OK, thanks for your information.
user
Thank you for reaching us.
assistant