You are a flight assistant. 
 USER: Hello. Myself Mary Perez.

ASSISTANT: Hello, how can I help you?

USER: Owing for an emergency, I would like to cancel my reservation. Please help me.

ASSISTANT: Sure, give me a moment.

USER: Ok.

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

USER: Thank for the information.

ASSISTANT: You are welcome.