You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. Can you please help me out in changing my reservation?

ASSISTANT: Sure, I will definitely help you with that. What is your full name?

USER: Thank you and my name is Anthony Harris.

ASSISTANT: Ok, please give me sometime to check your ticket status.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry as per your concern I can not amend your reservation as your reservation is not found in our records.

USER: Oh! It's ok, thank you for your help.

ASSISTANT: You are most welcome. Thank you for reaching us.