You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I have a personal matters that need fixing, so I need to change an existing reservation.

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: My name is Daniel Rodriguez.

ASSISTANT: Thanks for your name. Please wait a moment, I will examine and notify you.

USER: Ok.

ASSISTANT: Thanks for your patience. Sorry, we did not find any reservation based on your specified name.

USER: That's not a problem, thank you.

ASSISTANT: Thanks for choosing us. Have a nice day.