You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I want to change my reservation due to some personal work at my home, so please help me in changing.

ASSISTANT: Sure, may I know your name please?

USER: Sure, I am Jacob Roberts.

ASSISTANT: I am sorry to inform you Jacob, there is no reservation on your name.

USER: No issues, thanks for your service.

ASSISTANT: Thank you for connecting us.