You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Dorothy Thompson 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, please wait for a moment to check your details.

USER: Ok, take your time.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.