You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you now?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you help me to change my reservation?

ASSISTANT: Sure, I will help you in changing. May I know your name to check the current status of your ticket?

USER: I am Susan Taylor.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no active reservation found with your name, to change it.

USER: Oh! May be booking is not done properly. Thanks for your excellent customer service.

ASSISTANT: Thank you for reaching us.