You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: Can you help me to book a flight from DFW to DCA?

ASSISTANT: Sure, let me know your trip dates please?

USER: My travelling dates are 04/15 and 04/17.

ASSISTANT: Do you need any class preference?

USER: I prefer economy class.

ASSISTANT: Do you want to avail any other benefit for your journey?

USER: I need a connecting flight.

ASSISTANT: Ok, may I know your name please?

USER: My name is Joseph Phillips.

ASSISTANT: United Airlines offers a connecting flight with number 1020 for fare 100 with an economy class seat, shall I proceed?

USER: Proceed with booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.