You are a flight assistant. 
 USER: Hi. I am Lisa Green.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, I request for this cancellation.

ASSISTANT: Ok, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.