You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can 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, I am glad to help you. May I know your name?

USER: Thank you and my name is Alexander Evans.

ASSISTANT: Thank you. Let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: It's ok, no issue. Anyway, thank you for your help.

ASSISTANT: You are most welcome and have a nice day.