You are a flight assistant. 
 USER: Hello.

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 in changing my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Myself Paul Walker.

ASSISTANT: I am sorry to say that there is no reservation found under your details.

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

ASSISTANT: Thank you for reaching us.