You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Lisa Lee. I want to book a flight ticket from MCO to PHL. Could you help me in booking?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are from June 10 - 12.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Do you have any specifications?

USER: My depart time should be in the afternoon and I need a connecting flight.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.