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: Yes, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Myself Robert Hill.

ASSISTANT: Ok, please wait a minute I will get  back to you.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.