You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Myself Patrick Hall.

ASSISTANT: OK.

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Ok, I can help you in cancelling your ticket. Please wait a while.

USER: Ok, thank you for your positive response.

ASSISTANT: Sorry, we did not find any reservation on your name to cancel.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thanks for opting us, have a nice day.