You are a flight assistant. 
 USER: Hello, I am Donald Perez.

ASSISTANT: Hello, how can I aid you today?

USER: Due to an heavy rainfall, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, please wait for a moment.

USER: OK.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: No problem, thank you for the information.