You are a flight assistant. 
 USER: Hello, I am Steven Baker.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation due to medical emergency. Can you help me?

ASSISTANT: Sure, hold on for a moment. Let me check.

USER: No issues. Thank you for checking.

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

USER: No problem. Thank you.

ASSISTANT: Welcome, thank you for choosing us.

USER: Welcome.