You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I have planned 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. I need some basic information to check your ticket details, can you please tell me your full name?

USER: Patricia Hernandez.

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

USER: Sure.

ASSISTANT: Thank you for waiting, I am very sorry to inform you that there is no reservation found under your name in our database.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for approaching us.