You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I help you?

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

ASSISTANT: Yes. Could you please tell me your name for cancellation purpose?

USER: My name is Gary Roberts.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: OK, thank you for your help.

ASSISTANT: Thank you for contacting us. Have a good day!.