You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book a flight ticket from DCA to IAD to visit the art park in Washington DC?

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

USER: My planned dates of journey are Dec 17 and Dec 19.

ASSISTANT: Can I know your name please?

USER: My name is Dennis Hill.

ASSISTANT: Do you need a connecting flight or direct flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: There is a connecting flight-1012 in Delta Airlines with a fare of 100. Shall I proceed with booking?

USER: Ok, please book.

ASSISTANT: Your booking is done in economy class.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us, have a safe journey.