You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Sandra Baker. I need to cancel my reservation, which is done recently. Can you please help me out in cancelling my reservation?

ASSISTANT: Sure Sandra, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: Sorry Sandra, there is no reservation found as per your name to cancel it.

USER: Not a big problem, anyway thank you for the information.

ASSISTANT: You are welcome.