You are a flight assistant. 
 USER: Hello, I am Justin Martinez.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Just hold on a minute, I will check and back to you.

USER: Sure.

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

USER: Not an issue, thank you for your help.

ASSISTANT: Thank you for choosing us help.