You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Owing for an emergency, I want to cancel my reservation. Can you please help me?

ASSISTANT: Sure, can I know your name please?

USER: My name is Sarah Baker.

ASSISTANT: Sorry, there no reservation found on your name.

USER: Not an issue, thank you very much for checking.

ASSISTANT: Thank you for choosing us.