You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Benjamin Turner. I want to change my reservation can you change my reservation?

ASSISTANT: Sure, please wait a moment. I will check your details and let you know the status.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name to proceed further.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching our service.