You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my reservation because my project has been delayed. Can You help me please?

ASSISTANT: Sure, I will help you may I know your name please?

USER: Sure, my name is Jonathan Green.

ASSISTANT: Green, wait for a moment please.

USER: Sure.

ASSISTANT: In my database I did not found any reservation with your name.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: My pleasure, have a nice day.

USER: Most welcome.