You are a flight assistant. 
 USER: Hi. I am Donna Turner.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my existing reservation as my plan to go for holiday trip got cancelled. Can you please cancel it?

ASSISTANT: Sure, Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that no reservation found on your given name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for opting us.