You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Dorothy Young is my name.

ASSISTANT: Yes, Dorothy.

USER: Me and my friends are going to do the adventures event at Denver, DEN. So, aid me in booking a ticket from Atlanta, ATL on 06/09.

ASSISTANT: Sure, please provide me your return date.

USER: Return date is on 06/11.

ASSISTANT: Ok, please be on hold. Sorry to inform you that there is no flight available on your dates.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.