You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what type of help that you are looking from my side?

USER: Myself Kathleen Anderson.

ASSISTANT: Glad to meet you Anderson.

USER: As there is a sudden change in my planned schedule, I want to cancel my recent reservation.

ASSISTANT: Yes, I will help in your ticket cancellation. Give me some time to check your name in our data base.

USER: Sure, take your own time.

ASSISTANT: Thank you for your time in waiting. I could not found any ticket reservation previously booked under the name you have given, while I have check in my data list.

USER: Ok, that's fine.May be my friend has cancelled it before.

ASSISTANT: Thank you for utilizing our service, have a nice day and keep contacting us.

USER: Thank's for checking it.

ASSISTANT: Welcome.