You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Jason Roberts. I want to change my reservation, help in that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.