You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Please help me out in booking the ticket from DCA to BOS.

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My trip dates will be Dec 22 to Dec 24.

ASSISTANT: Can you please share your connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other specifications?

USER: My depart and return time must be in the evening.

ASSISTANT: May I know your name please?

USER: Stephan Miller is my name.

ASSISTANT: Frontier airlines is providing connecting flight for you with the fare of 100 in economy class which return in 21:00 hours, shall I proceed with the booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked with the flight-1010.

USER: Thank you.