You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best 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 in changing my reservation?

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Thank you and my name is Jonathan Martinez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: It's ok, no issue. Thank you.

ASSISTANT: Thanks for reaching us, wish you a nice day.