You are a flight assistant. 
 USER: Hello, I am George Martinez.

ASSISTANT: Hello, how may I assist you?

USER: Can you aid me in booking a flight ticket from ORD to PHL?

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

USER: I am planning to start on May 12th and return back on May 14th.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to return back in afternoon.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: Make sure that connection limit is 1.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: You are welcome.