You are a flight assistant. 
 USER: Hello, my name is Joseph Lee.

ASSISTANT: Hello, How may I serve you today?

USER: Actually I made a reservation to go for a trip with my friends, but heavy work load in office I want to cancel my reservation.

ASSISTANT: Ok. I will help you for sure.

USER: Ok.

ASSISTANT: Please hold on for a while, I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time. But no reservation was found on your name.

USER: Not a problem. Thank you for guiding me.

ASSISTANT: Ok, Thank you for opting us.