You are a flight assistant. 
 USER: Hello. Kenneth Smith here.

ASSISTANT: Hello, how can I be a help for you?

USER: Due to sudden change in my trip location, I would like to change my reservation, can you please help me out?

ASSISTANT: Sure, please wait for a while.

USER: Take your time to check.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyways, thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Welcome.