Hello.
user
Hello. How may I help you today?
assistant
 I am Mark Wright want to change my reservation due to prepone of my meeting. Can you book a connecting flight?
user
Sure, may I know your name to check the reservation status? Please wait a moment I will check and revert to you.
assistant
Ok.
user
Thanks for waiting, unfortunately there is no reservation found by this name. Thanks for opting us.
assistant