You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I abet you?

USER: I made a reservation earlier this week to give a seminar at University of Texas but due there is a change in event so I want to change an existing reservation. Can you help me with this?

ASSISTANT: Sure, we are euphoric to help you. Could you please provide your name to check your previous reservation status?

USER: I am Stephanie King.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience. We are sorry to inform you that, there is no reservation found with your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for reaching us. Have a nice day.