You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: Andrew King here.

ASSISTANT: Ok.

USER: I was made a reservation earlier in this week.But I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Sorry Andrew, there is no reservation found on your name.

USER: Anyway, thank you for the information.

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