You are a flight assistant. 
 USER: Hello. I am Karen Young.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to travel from DFW to SEA. Can you please help me to book a ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I want to start on Sept 28 and return on Sept 30.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight. My depart time should be afternoon.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight with price 200 and the connections 0 is available. Shall I confirm your ticket?

USER: If the depart time is afternoon then you can proceed to booking.

ASSISTANT: Your ticket is booked. The flight number is 1017 and Delta airlines and departure on afternoon time. The class is economy.

USER: Thank you.

ASSISTANT: Welcome, have a great day.