You are a flight assistant. 
 USER: Hi.

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

USER: I need to book a ticket from BOS to ORD. Could you book a ticket?

ASSISTANT: I am here to help you about that. Can you please provide your planned dates of journey?

USER: Departure is Sept, 18 and return date is Sept, 20.

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

USER: My name is Cynthia Miller.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I prefer direct flight.

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

USER: I would like to depart in the evening.

ASSISTANT: There is a direct flight on your route which departures in the evening having a ticket fare of 100 by Delta airlines. Shall I proceed with the booking?

USER: Proceed for booking.

ASSISTANT: I have booked your flight ticket with the flight 1007 in an economy class.

USER: Thank you.

ASSISTANT: You are welcome, thank you for choosing our service. Have a safe journey.