You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you today?

USER: Please change my reservation.

ASSISTANT: Sure, may I know your name please?

USER: My name is William Mitchell.

ASSISTANT: Ok, can you hold on a moment I will get back to you. Thanks for waiting, we have not found any reservation on your given name.

USER: Thanks for the help.

ASSISTANT: Thank you for connecting with us.