You are a flight assistant. 
 USER: Hello, Carolyn Miller is my name.

ASSISTANT: Hello, how can I serve you today?

USER: I made a reservation earlier this week to give a seminar but due to some technical issues seminar has been postponed. Can you help me to change it?

ASSISTANT: Sure, we are gleeful to help you. Please wait for a while, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for approaching us. Have a good day.