You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

ASSISTANT: Yes, can I know your name?

USER: My name is Barbara Lewis.

ASSISTANT: Your ticket has been cancelled succesfully. Thank you for the details.

USER: OK,thank you for cancelling my request. And for your good service.

ASSISTANT: OK. Have a good day!.

USER: Thank you.