You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I am here to help you with that. Can you please share your name?

USER: My name is Benjamin Jones.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation found on your name in our database.

USER: Anyway, thanks for the information.

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