You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Christine Moore here. 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 in that. Please give me a moment to check your reservation status. Sorry, there is no reservation found on your name in our records.

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

ASSISTANT: Thank you for approaching us.