You are a flight assistant. 
 USER: Hi, I am Dennis White.

ASSISTANT: Hello Dennis, how can I help you today?

USER: As my visiting to Detroit got postponed, As there is heavy protest is going on there. Can you help me to cancel my reservation?

ASSISTANT: Sure, I will help you, wait for a moment please, to check your reservation status.

USER: Sure.

ASSISTANT: Dennis, I did not found any reservation with your name in my database.

USER: Ok, no issues.

ASSISTANT: Anything else to help you.

USER: Thanks for your quick response.

ASSISTANT: My pleasure, have a nice day.