You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I did not get my leaves granted by my officer, so I would like to change my existing reservation.

ASSISTANT: Sure, I will help you before checking your status of your reservation can I have your name?

USER: Sure, my name is Samuel Turner.

ASSISTANT: Thanks for giving your name, please wait a moment let me check.

USER: Sure, take your time.

ASSISTANT:  Samuel Turner, there is no reservation found under your name.

USER: Ok, no issue.

ASSISTANT: Ok, thanks for consulting us.

USER: Thank you for your information.