You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help can I do for you?

USER: Can you help me to cancel my recent reservation?

ASSISTANT: Sure, our service can help in all the service.

USER: Thank you.

ASSISTANT: Can you please provide me your name for searching the ticket in our data base?

USER: Nancy Smith here.

ASSISTANT: Thank you for your information.

USER: That's fine.

ASSISTANT: Sorry Smith, no reservation is found in our data base to cancel your recent booking. Is there any other help that you need?

USER: No, thanks for your information.

ASSISTANT: Ok, thank you for choosing our service and provide the feed back in our website if you are happy with our service.