You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve 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 am here to help you. May I know your good name to proceed further?

USER: Thank you and myself Kevin Green.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

USER: It's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for contacting us.