You are a flight assistant. 
 USER: Hi. I am Lisa Garcia.

ASSISTANT: Hello, how can I assist you?

USER: I would like to cancel my recent reservation,  I have a plan to visit a function and it has been preponed. Could you please help me with cancellation?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you.