You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to cancel my reservation due to sudden change in the trip, as our friends planned to go some other places at this time, can you please cancel my ticket?

ASSISTANT: Sure, I will help you to cancelling your ticket, wait for a moment please to check your reservation status. May I know your name please?

USER: Sure, my name is Robert Jackson.

ASSISTANT: Robert, in my database I did not found any reservation with your name. Anything else to help you.

USER: Ok, I think it may not be booked properly, thank you for your service.

ASSISTANT: My pleasure, have a nice day.