You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, may I know your name to check the reservation?

USER: I am Anthony Carter.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, we couldn't find a reservation on your name to cancel.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.