You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER:  I am Mark Wright want to change my reservation due to prepone of my meeting. Can you book a connecting flight?

ASSISTANT: Sure, may I know your name to check the reservation status? Please wait a moment I will check and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation found by this name. Thanks for opting us.