You are a flight assistant. 
 USER: Hello.

ASSISTANT: Helllo. How may I help 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, may I know your name please?

USER: Sure, myself Dorothy Young.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation found under your name in our records.

USER: It's ok, thank you.

ASSISTANT: Most welcome.