You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my friend's birthday at Detroit. Can you please book a ticket with a price limit of 500?

ASSISTANT: Sure, May I know your airport abbreviates?

USER: My origin is Atlanta, GA - ATL and landing point is MI - DTW.

ASSISTANT: May I know your name?

USER: Rebecca Evans.

ASSISTANT: May I know your travelling dates?

USER: I need to depart on 07/29 and return on 07/31. I need one connection.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to tell that there is no flight found on your request.

USER: not an issue. Thanks for your response.

ASSISTANT: Thank you for approaching us.