You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to change my existing reservation because of some issues is going in my location.

ASSISTANT: Sure, can I have your name, so that I will check the reservation?

USER: Myself Anna Moore.

ASSISTANT: Sorry Anna, no reservation found on your name, I think your previous reservation is not confirmed before.

USER: That's ok, no problem.

ASSISTANT: Do you need any other help?

USER: No, thanks of your help.

ASSISTANT: Thank you for utilising our services.