You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Nicole Jackson here and I am looking for changing my reservation to other date, can you please help me out with that?

ASSISTANT: Sure, please wait for a moment.

USER: Thank you for accepting my request, take your time.

ASSISTANT:  Sorry, no active reservation found on your name in our data base.

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

ASSISTANT: Welcome, thank you for the information.