You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to meet my friend at DFW, can you please avail me a flight ticket from PHL?

ASSISTANT: I am here to help you in booking your flight ticket. Can you please provide your scheduled dates of journey?

USER: Thank you, my scheduled travel dates are from Sept 1st to Sept 3rd.

ASSISTANT: Would you like to travel in a connecting fight or a direct flight?

USER: I would like to travel in connecting flight.

ASSISTANT: Can you please provide your name for booking purpose?

USER: I am Lisa Moore.

ASSISTANT: Do you have any other preferences for your journey?

USER: No.

ASSISTANT: I regret to say this Lisa Moore, there are no flights which travels on your planned dates of journey.

USER: No problem at all. Thank you.

ASSISTANT: You are welcome, thank you for reaching us.