You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Betty Roberts here. I was made a reservation to Chicago for attending a business meeting, earlier in this week. But suddenly the organisers changed the location to Austin. Can you please help me for changing my reservation?

ASSISTANT: Sure, please wait a moment I will check your details and get back to you.

USER: Ok, take your time.

ASSISTANT: Sorry Betty, I did not find any details in my database regarding your reservation.

USER: Anyway, thank you for the information.

ASSISTANT: You are welcome. Have a nice day.