You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I address you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, please provide me you name to render your existing ticket.

USER: I am Jason Walker.

ASSISTANT: We regret to say that there is no active reservation found on your name.

USER: No problem, thank you for the checking.

ASSISTANT: Thank you for choosing us.