You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist 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 with changing of my reservation?

ASSISTANT: Sure, I am here to help you with your concern. May I know your name please to check the status of your reservation?

USER: Janet Turner here.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Janet Turner, no reservation has been found on your name in our records.

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

ASSISTANT: Thank you for choosing us.