You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to cancel my reservation because of some issues. Could you help me in cancelling the reservation?

ASSISTANT: Give me a moment, let me check your details.

USER: My name is Linda Allen.

ASSISTANT: Sorry Linda, I didn't found any reservation basis on your details.

USER: Thank you for your help.

ASSISTANT: You are welcome.