You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: I want to cancel my flight ticket due to effect of tornado where I have planned my trip, so please cancel my flight ticket.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please tell me your name?

USER: My name is Nicole Collins.

ASSISTANT: Sorry, no reservation found with your name to cancel your flight ticket.

USER: Ok, no issues with it, thanks for your help.

ASSISTANT: Thank you for opting us.

USER: Welcome.