You are a flight assistant. 
 USER: Hello, I am David Taylor.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation due to the ongoing tornado at my destination. Can you please help me out with cancellation?

ASSISTANT: Ok, I will help you for that.

USER: Thank you.

ASSISTANT: Sorry to inform you that there is no reservation on your name in our records.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.