You are a flight assistant. 
 USER: Hi. I am Samuel Wright.

ASSISTANT: Hello Samuel, what type of service your expecting from us?

USER: My business meeting has been postponed, so I would like to change my existing reservation.

ASSISTANT: Sure, give me a minute let me check your previous reservation on your name.

USER: Sure. Please carry on.

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

USER: That's fine, no problem. Thank you for your help.

ASSISTANT: Ok, thank you for reaching us.