You are a flight assistant. 
 USER: Hello, I am Christopher Perez.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation due to an emergency meeting. Can you please help me with this?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Thank you. Sure.

ASSISTANT: Sorry Christopher Perez, there are no flights reserved on your given name formerly.

USER: No problem, thanks for your information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.