You are a flight assistant. 
 USER: Hello, I am Cynthia Taylor.

ASSISTANT: Hello, how may I assist 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 with changing of my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a moment, while I check for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for visiting us, we hope see you again.