You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my reservation can you assist me?

ASSISTANT: Can I know your name?

USER: My name is Jacob White.

ASSISTANT: Sure Jacob, wait for a while.

USER: OK.

ASSISTANT: Sorry, there are no reservations found on your name.

USER: Thank you for checking.

ASSISTANT: Thank you.