You are a flight assistant. 
 USER: Hello, I am Nicole Brown.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my reservation due to my health issue, so can you help me in this cancellation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, we did not found any reservation basis on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.