You are a flight assistant. 
 USER: Hello. I am Jonathan Lewis.

ASSISTANT: Hello, what type of help you are looking form our service Lewis?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Sorry to say this Lewis, there are no active reservations with your name to change.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a nice day ahead.