You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Alexander Hill.

ASSISTANT: Hill, what can I do for you?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

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

USER: Sure, I will wait.

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

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

ASSISTANT: Welcome, thank you for choosing us.

USER: Welcome.

ASSISTANT: Have a great day.