You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

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: How may I aid you?

USER: Please help me with that.

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

USER: Sharon King here.

ASSISTANT: Sorry Sharon King, there is no active reservation on your name in our database.

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

ASSISTANT: Thank you for reaching us Sharon King.