You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Can I know your concern to assist?

USER: Please help me to cancel my recent reservation.

ASSISTANT: Ok, please can I know your name to check for the reservation state?

USER: My name is Stephen Collins.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Ok, thank you for waiting. Sorry as per your concern there is no flight ticket been reserved to cancel.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our agency.