You are a flight assistant. 
 USER: Hello, Patrick Robinson here.

ASSISTANT: Hello, How can I help you?

USER: I need to cancel my recent last reservation. Can you please help me?

ASSISTANT: Sure, please hold on for a minute.

USER: OK.

ASSISTANT: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: OK. Thank you.

ASSISTANT: Thanks for using us.