You are a flight assistant. 
 USER: Hi. I am Betty Collins.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket on dates 12/17 and 12/19.

ASSISTANT: Sure, kindly share your airport codes?

USER: My airport codes are PHL and MCO.

ASSISTANT: Do you have connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your other specifications?

USER: I want to depart at evening.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.