You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you right now?

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: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please provide your name to check your previous reservation.

USER: Myself Eric Gonzalez.

ASSISTANT: Wait a moment.

USER: Ok, take your time.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our reservation list.

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

ASSISTANT: Thank you for approaching us, have a great day.