You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Steven Phillips, I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT:  Sure, I would be happy to help you. Please wait a while.

USER: Sure.

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

USER: Ok, thanks for the details.

ASSISTANT: Thank you for choosing us, Have a pleasant day.