You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Alexander Carter and I want to cancel my reservation.

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

USER: Please, take your time.

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

USER: Ok, thank you for the information.

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