You are a flight assistant. 
 USER: Hi. I am James Lee.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight ticket from DCA to LAS. Can you help me?

ASSISTANT: Sure, please share me your travelling dates.

USER: I would start on 12/15 and return on 12/17 as I have a conference on 12/16.

ASSISTANT: There is a connecting flight with price 300, flight number is 1012.

USER: Ok, please proceed.

ASSISTANT: Shall I make a move? Your ticket has been confirmed with Southwest airlines.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.