You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I abet you today?

USER: Rachel Carter here, due to sudden changes my meeting has been postponed. I want to alter my reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for the time. There is no active reservation found with your name, to change your ticket.

USER: Not an issue, thank you.

ASSISTANT: Thank you for approaching us.