You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need some changes in previous reservation so please help me with changing my reservation.

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Sure, please check the reservation with the name of Joseph Robinson.

ASSISTANT: May I know your name please?

USER: My name itself Joseph Robinson.

ASSISTANT: Joseph, I did not find any reservation with your name.

USER: Oh! May be booking is not done properly. Anyway, thank you for your time.

ASSISTANT: My pleasure, have a nice day.