You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My business trip was postponed, I want to change my reservation can you help me?

ASSISTANT: Can I know your name please?

USER: My name is Robert Edwards.

ASSISTANT: Sorry Edwards, I didn't find any reservation basis on your details.

USER: OK. Thank you for checking.

ASSISTANT: You are welcome.