You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for this moment?

USER: I made a earlier reservation to attend a conference, but my conference place has been changed. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please for further process. Please wait for a moment.

USER: Myself Stephanie Scott.

ASSISTANT: Ok. Sorry Scott, there is no reservation found as per your name to change your reservation in your database.

USER: Ok, fine thank you for your help.

ASSISTANT: You are welcome, have a safe flight.