You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi. How can I help you?

USER: Catherine Brown here. Can you help me in ticket cancellation?

ASSISTANT: Sure, on which name can I cancel the reservation?

USER: On my name only, I have booked my ticket.

ASSISTANT: I am sorry no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.