You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. 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: Ok, may I know your name?

USER: My name is Mark Edwards.

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.