You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Carol Green, I want to change my reservation as my plan to meet my cousin is postponed. Can you change my reservation?

ASSISTANT: Sure, we are here to help you. Please hold a moment, let me check your reservation and let you know.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no reservation found on your name.

USER: Ok, thank you for the details.

ASSISTANT: Thank you for connecting with us.