You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: My name is Charles Wilson, I want to change my reservation as my plan to meet my brother is postponed. Can you change my reservation?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for the time, we did not find reservation on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.