You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christopher Hall.

ASSISTANT: Hall, how can I aid you today?

USER: Owing an emergency, I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Hold on for a moment. Let me check.

USER: Ok, take your time.

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

USER: That's ok, thank you for checking.

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