You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking flight ticket from EWR to PHL.

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

USER: My trip dates are Aug 20 to Aug 22.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: My return should be in the evening in normal cost airline.

ASSISTANT: Your good name please.

USER: Kevin Moore here.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.