You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Can I know your travelling dates?

USER: My trip dates are Jan 13 to Jan 15.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: Let me know your name.

USER: Myself Steven Martin.

ASSISTANT: Connecting flight can be booked with airline Delta for price 200 having flight number 1021.

USER: You can proceed.

ASSISTANT: Ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you.