You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Michelle Phillips here.

ASSISTANT: Yes, Phillips.

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

ASSISTANT: Sure, please give me a moment. I will check your reservation details.

USER: Ok, take your time.

ASSISTANT: Phillips, there is no reservation found under your name in our database.

USER: Ok, thank you for the information.

ASSISTANT: Welcome, thank you for using our service.