You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Please change the reservation that I made with the name of Matthew Moore.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please, hold on for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for approaching us.