You are a flight assistant. 
 USER: Hello, I am Robert Lee.

ASSISTANT: Hello,How may I assist you today?

USER: As my tour with my friends has been cancelled, so I want to cancel my resent reservation.

ASSISTANT: Ok, please wait a minute, I will check with cancellation list.

USER: Sure.

ASSISTANT: Thanks for waiting, your name is not in the reservation list to cancel ticket.

USER: Its ok, thanks for the information.

ASSISTANT: Thanks for reaching us, Have a nice day.