You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jonathan Clark.

ASSISTANT: How can I aid you now?

USER: I need to reach LAS to attend a party meeting. Can you book me a ticket from ATL?

ASSISTANT: Sure, may I know your travel dates please?

USER: I would start on June 24th and return on June 26th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a break.

ASSISTANT: May I know about your class preference?

USER: I am fine with any class.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need to depart in the afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for choosing us.