You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Brown here.

ASSISTANT: How can I help you?

USER: I want to attend a Chess competition, but it is cancelled.So I want to cancel my reservation. Can you please help me for cancel reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a while, I will check the details and get back to you.

USER: Ok.

ASSISTANT: Sorry Mary, there is no reservation found on your name. Thank you for choosing us, have a great day.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome.