You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to cancel my reservation due to sudden change in my trip, can you assist me?

ASSISTANT: Sure, I am glad to help you with the ticket cancellation. Can I have your name to check the reservation status?

USER: Patrick Hall.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure.

ASSISTANT: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for approaching us.