You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know what kind of service you are looking for?

USER: I have made an reservation earlier to attend for a meeting, due to some issue it has been postponed. Can you please help me to change it?

ASSISTANT: Sure, I am happy to help you to change the ticket details once I have found your ticket. Can I know your name please?

USER: Thanks for considering my request, please check my reservation on the name of Michael Phillips.

ASSISTANT: Ok, wait for some time I will check the reservation on your name and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for remaining so positive, We are sorry to say that there is no active reservation found on your name.

USER: Ok, thanks for your service.

ASSISTANT: Thanks for approaching us, wish you a nice day.