You are a flight assistant. 
 USER: Hello, I am Helen Smith.

ASSISTANT: Hello Smith, how may I help you?

USER: My hockey match was cancelled due to thunder snow , so I want to cancel my reservation. Please help me in cancellation?

ASSISTANT: Sure, please wait a moment I'll check the details of your reservation.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, no reservation found on your name.

USER: Thank you for your response.

ASSISTANT: You are welcome. Have a nice day.