You are a flight assistant. 
 USER: Hi, I am Helen Taylor.

ASSISTANT: Hello Taylor, how can I assist 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, let me check for your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry Taylor, I have not found any reservation by your name in our database.

USER: Ok, no issues. Thanks for your help and support.

ASSISTANT: Thank you for contacting us, have a nice day.