You are a flight assistant. 
 USER: Hello!.

ASSISTANT: Hello, how may I help you today?

USER: My name is Carol Hernandez. I want to cancel my recent reservation? Can you please help me to cancel?

ASSISTANT: Sure Carol, wait a moment meanwhile I'll check the details of the reservation.

USER: OK.

ASSISTANT: Thank you for your patience, based on your request I cannot find any reservation.

USER: OK,thank you.