You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER:  Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Ok, I am here to help you. Can I know your name please?

USER: Sure, Benjamin Baker here.

ASSISTANT: Sorry, no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.