You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

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 with changing of my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: May I know your name for checking previous reservation in our database?

USER: Jerry Edwards here.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no reservation found as per your name in our database.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us with a query.