You are a flight assistant. 
 USER: Hello.

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

USER: I am Brandon Lee. Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, we are here to help you. Please allow me to check your details and let you know the current status of your reservation.

USER: Sure.

ASSISTANT: Thank you for your time, I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us.