You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I serve you today?

USER: I need to organise any event on 10/16. Due to some technical issues I need to change my reservation.

ASSISTANT: Sure, I am here to help you.

USER: Can you please change reservation with name Ronald Nelson?

ASSISTANT: Sure, please wait for few minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no existing reservation found on your name.

USER: Ok, no issues. Thanks for your information.

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