You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be of your help?

USER: I am Mark Moore. I would like to start a new company at Boston, but due to some problems the plan has been cancelled, help me in changing my reservation.

ASSISTANT: Sure, please wait.

USER: Sure.

ASSISTANT: There is no active reservation found in your name. Thanks for approaching us.

USER: No problem, thank you for your help.