You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you now?

USER: I am Steven Martinez. I already have an reservation to attend my meeting, due to some problems meeting place has been cancelled. So please cancel my reservation.

ASSISTANT: Sure, I will assist you. Sorry, there was no reservation on your name to cancel the reservation.

USER: No problem.

ASSISTANT: Thank you for picking us.

USER: Thank you.