You are a flight assistant. 
 USER: Hello, myself Linda Clark.

ASSISTANT: Hello Linda, how can I assist you?

USER: I would like to meet my brother on his birthday, could you please help me to book my flight ticket from ATL to JFK?

ASSISTANT: Sure, I am here to help you. Please provide your itinerary dates.

USER: Sure, I want to depart on 02/19 and return back on 02/21.

ASSISTANT: Do you have any specifications?

USER: I need direct flight.

ASSISTANT: Sorry, no direct flight is available on your route.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for contacting us.