You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Matthew Nelson. Owing to an emergency, I want to cancel my recent reservation, can you help me in cancellation?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.