You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in cancelling my recent reservation?

ASSISTANT: May I know your name please?

USER: Please check the reservation on the name of David Carter.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.