You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues, can you please help me with this?

ASSISTANT: Sure, may I know your name?

USER: I am Scott Campbell.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.