You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Matthew Brown. Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Yes, I can help you. Give me a moment.

USER: Thank you. Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.