You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Rachel Williams. I want to change my reservation, help in that?

ASSISTANT: Sure, I am glad to help you with that.

USER: Ok.

ASSISTANT: Please hold on a moment, I will check your reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation found in your name Rachel Williams.

USER: That's ok.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you for your help.