You are a flight assistant. 
 USER: Hello, Nancy Smith here.

ASSISTANT: Hello, how can I help you today?

USER: My plan to visit a function is postponed so I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you to cancel the reservation. Please wait for a moment.

USER: OK, I will wait.

ASSISTANT: Thanks for waiting, there is no any reservation found on your name.

USER: OK, no issue. Thanks for your assistance.

ASSISTANT: Thank you, have a good day.