You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Sarah Mitchell, owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure Sarah, give me a moment.

USER: Ok.

ASSISTANT: Sorry, I didn't found any reservation basis on your details.

USER: No problem. Thank you for checking.

ASSISTANT: You are welcome.