You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Patrick Allen here. Can you please help me in booking my flight from ATL, as I have to meet my friends at PHL?

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

USER: Sure, my travel dates are Sep 11th and 13th.

ASSISTANT: Is there any class preference for you?

USER: No, I am comfortable in any class.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: I need to return in the afternoon.

ASSISTANT: Please wait for a moment.

USER: Ok, sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, not a problem. Anyways, thank you.

ASSISTANT: Thank you for reaching us.